1981/1/1: 010181 = up-down mirror symmetric
1981/1/1: 010181 = 01:01:81 = each is up-down mirror symmetric
1981/1/1: 010181 = 010:181 = each is left-right mirror symmetric
1981/1/1: 010181 = 010:181 = each is palindrome
1981/1/1: 010181 = 010:181 = each is up-down mirror symmetric
1981/1/1: 01181 = up-down mirror symmetric
1981/1/1: 10181 = up-down mirror symmetric
1981/1/1: 1181 = up-down mirror symmetric
1981/1/1: 1181 = 11:81 = each is up-down mirror symmetric
1981/1/1: 810101 = up-down mirror symmetric
1981/1/1: 810101 = 81:01:01 = each is up-down mirror symmetric
1981/1/1: 810101 = 810:101 = each is up-down mirror symmetric
1981/1/1: 81011 = up-down mirror symmetric
1981/1/1: 81101 = up-down mirror symmetric
1981/1/1: 8111 = up-down mirror symmetric
1981/1/1: 8111 = 81:11 = each is up-down mirror symmetric
1981/1/2: 020181 = 020:181 = each is palindrome
1981/1/3: 030181 = 030:181 = each is palindrome
1981/1/4: 040181 = 040:181 = each is palindrome
1981/1/5: 050181 = 050:181 = each is palindrome
1981/1/6: 060181 = 060:181 = each is palindrome
1981/1/7: 070181 = 070:181 = each is palindrome
1981/1/8: 010881 = up-down mirror symmetric
1981/1/8: 010881 = 01:08:81 = each is up-down mirror symmetric
1981/1/8: 010881 = 010:881 = each is up-down mirror symmetric
1981/1/8: 01881 = up-down mirror symmetric
1981/1/8: 080181 = up-down mirror symmetric
1981/1/8: 080181 = 08:01:81 = each is up-down mirror symmetric
1981/1/8: 080181 = 080:181 = each is left-right mirror symmetric
1981/1/8: 080181 = 080:181 = each is palindrome
1981/1/8: 080181 = 080:181 = each is up-down mirror symmetric
1981/1/8: 08181 = up-down mirror symmetric
1981/1/8: 10881 = up-down mirror symmetric
1981/1/8: 1881 = palindrome
1981/1/8: 1881 = left-right mirror symmetric
1981/1/8: 1881 = up-down mirror symmetric
1981/1/8: 1881 = 18:81 = each is up-down mirror symmetric
1981/1/8: 80181 = up-down mirror symmetric
1981/1/8: 810108 = up-down mirror symmetric
1981/1/8: 810108 = 81:01:08 = each is up-down mirror symmetric
1981/1/8: 810108 = 810:108 = each is up-down mirror symmetric
1981/1/8: 81018 = palindrome
1981/1/8: 81018 = left-right mirror symmetric
1981/1/8: 81018 = up-down mirror symmetric
1981/1/8: 81108 = up-down mirror symmetric
1981/1/8: 8118 = palindrome
1981/1/8: 8118 = left-right mirror symmetric
1981/1/8: 8118 = up-down mirror symmetric
1981/1/8: 8118 = 81:18 = each is up-down mirror symmetric
1981/1/8: 8181 = up-down mirror symmetric
1981/1/8: 8181 = cyclic permutation symmetric
1981/1/8: 8181 = 81:81 = each is up-down mirror symmetric
1981/1/9: 010981 = 01:09:81 = geometric series of ratio 9
1981/1/9: 090181 = 090:181 = each is palindrome
1981/1/10: 011081 = up-down mirror symmetric
1981/1/10: 011081 = 01:10:81 = each is up-down mirror symmetric
1981/1/10: 011081 = 011:081 = each is up-down mirror symmetric
1981/1/10: 100181 = up-down mirror symmetric
1981/1/10: 100181 = 10:01:81 = each is up-down mirror symmetric
1981/1/10: 100181 = 100:181 = each is up-down mirror symmetric
1981/1/10: 10181 = up-down mirror symmetric
1981/1/10: 11081 = up-down mirror symmetric
1981/1/10: 810110 = up-down mirror symmetric
1981/1/10: 810110 = 81:01:10 = each is up-down mirror symmetric
1981/1/10: 810110 = 810:110 = each is up-down mirror symmetric
1981/1/10: 81110 = up-down mirror symmetric
1981/1/11: 011181 = up-down mirror symmetric
1981/1/11: 011181 = 01:11:81 = each is up-down mirror symmetric
1981/1/11: 011181 = 011:181 = each is up-down mirror symmetric
1981/1/11: 110181 = up-down mirror symmetric
1981/1/11: 110181 = 11:01:81 = each is up-down mirror symmetric
1981/1/11: 110181 = 110:181 = each is up-down mirror symmetric
1981/1/11: 11181 = up-down mirror symmetric
1981/1/11: 810111 = up-down mirror symmetric
1981/1/11: 810111 = 81:01:11 = each is up-down mirror symmetric
1981/1/11: 810111 = 810:111 = each is up-down mirror symmetric
1981/1/11: 81111 = up-down mirror symmetric
1981/1/17: 011781 = 011:781 = integer ratio of 1 to 71
1981/1/18: 011881 = up-down mirror symmetric
1981/1/18: 011881 = 01:18:81 = each is up-down mirror symmetric
1981/1/18: 011881 = 011:881 = each is up-down mirror symmetric
1981/1/18: 11881 = up-down mirror symmetric
1981/1/18: 180181 = up-down mirror symmetric
1981/1/18: 180181 = 18:01:81 = each is up-down mirror symmetric
1981/1/18: 180181 = 180:181 = each is up-down mirror symmetric
1981/1/18: 18181 = palindrome
1981/1/18: 18181 = left-right mirror symmetric
1981/1/18: 18181 = up-down mirror symmetric
1981/1/18: 810118 = up-down mirror symmetric
1981/1/18: 810118 = 81:01:18 = each is up-down mirror symmetric
1981/1/18: 810118 = 810:118 = each is up-down mirror symmetric
1981/1/18: 81118 = palindrome
1981/1/18: 81118 = left-right mirror symmetric
1981/1/18: 81118 = up-down mirror symmetric
1981/2/1: 020181 = 020:181 = each is palindrome
1981/2/7: 2781 = 27:81 = integer ratio of 1 to 3
1981/2/7: 8127 = 81:27 = integer ratio of 3 to 1
1981/2/18: 18281 = palindrome
1981/2/18: 81218 = palindrome
1981/3/1: 030181 = 030:181 = each is palindrome
1981/3/18: 18381 = palindrome
1981/3/18: 81318 = palindrome
1981/4/1: 040181 = 040:181 = each is palindrome
1981/4/5: 810405 = 810:405 = integer ratio of 2 to 1
1981/4/18: 041881 = 04:18:81 = geometric series of ratio 4.5
1981/4/18: 18481 = palindrome
1981/4/18: 81418 = palindrome
1981/5/1: 050181 = 050:181 = each is palindrome
1981/5/18: 18581 = palindrome
1981/5/18: 81518 = palindrome
1981/6/1: 060181 = 060:181 = each is palindrome
1981/6/18: 18681 = palindrome
1981/6/18: 81618 = palindrome
1981/7/1: 070181 = 070:181 = each is palindrome
1981/7/2: 2781 = 27:81 = integer ratio of 1 to 3
1981/7/17: 071781 = 071:781 = integer ratio of 1 to 11
1981/7/18: 18781 = palindrome
1981/7/18: 81718 = palindrome
1981/8/1: 010881 = up-down mirror symmetric
1981/8/1: 010881 = 01:08:81 = each is up-down mirror symmetric
1981/8/1: 010881 = 010:881 = each is up-down mirror symmetric
1981/8/1: 01881 = up-down mirror symmetric
1981/8/1: 080181 = up-down mirror symmetric
1981/8/1: 080181 = 08:01:81 = each is up-down mirror symmetric
1981/8/1: 080181 = 080:181 = each is left-right mirror symmetric
1981/8/1: 080181 = 080:181 = each is palindrome
1981/8/1: 080181 = 080:181 = each is up-down mirror symmetric
1981/8/1: 08181 = up-down mirror symmetric
1981/8/1: 10881 = up-down mirror symmetric
1981/8/1: 1881 = palindrome
1981/8/1: 1881 = left-right mirror symmetric
1981/8/1: 1881 = up-down mirror symmetric
1981/8/1: 1881 = 18:81 = each is up-down mirror symmetric
1981/8/1: 80181 = up-down mirror symmetric
1981/8/1: 810801 = up-down mirror symmetric
1981/8/1: 810801 = 81:08:01 = each is up-down mirror symmetric
1981/8/1: 810801 = 810:801 = each is up-down mirror symmetric
1981/8/1: 81081 = up-down mirror symmetric
1981/8/1: 81801 = up-down mirror symmetric
1981/8/1: 8181 = up-down mirror symmetric
1981/8/1: 8181 = cyclic permutation symmetric
1981/8/1: 8181 = 81:81 = each is up-down mirror symmetric
1981/8/8: 080881 = up-down mirror symmetric
1981/8/8: 080881 = 08:08:81 = each is up-down mirror symmetric
1981/8/8: 080881 = 080:881 = each is up-down mirror symmetric
1981/8/8: 08881 = up-down mirror symmetric
1981/8/8: 80881 = up-down mirror symmetric
1981/8/8: 810808 = up-down mirror symmetric
1981/8/8: 810808 = 81:08:08 = each is up-down mirror symmetric
1981/8/8: 810808 = 810:808 = each is up-down mirror symmetric
1981/8/8: 81088 = up-down mirror symmetric
1981/8/8: 81808 = up-down mirror symmetric
1981/8/8: 8188 = up-down mirror symmetric
1981/8/8: 8188 = 81:88 = each is up-down mirror symmetric
1981/8/8: 8881 = up-down mirror symmetric
1981/8/8: 8881 = 88:81 = each is up-down mirror symmetric
1981/8/9: 981981 = cyclic permutation symmetric
1981/8/10: 081081 = up-down mirror symmetric
1981/8/10: 081081 = cyclic permutation symmetric
1981/8/10: 081081 = 08:10:81 = each is up-down mirror symmetric
1981/8/10: 081081 = 081:081 = each is up-down mirror symmetric
1981/8/10: 100881 = up-down mirror symmetric
1981/8/10: 100881 = 10:08:81 = each is up-down mirror symmetric
1981/8/10: 100881 = 100:881 = each is up-down mirror symmetric
1981/8/10: 10881 = up-down mirror symmetric
1981/8/10: 81081 = up-down mirror symmetric
1981/8/10: 810810 = up-down mirror symmetric
1981/8/10: 810810 = cyclic permutation symmetric
1981/8/10: 810810 = 81:08:10 = each is up-down mirror symmetric
1981/8/10: 810810 = 810:810 = each is up-down mirror symmetric
1981/8/10: 81810 = up-down mirror symmetric
1981/8/11: 081181 = up-down mirror symmetric
1981/8/11: 081181 = 08:11:81 = each is up-down mirror symmetric
1981/8/11: 081181 = 081:181 = each is up-down mirror symmetric
1981/8/11: 110881 = up-down mirror symmetric
1981/8/11: 110881 = 11:08:81 = each is up-down mirror symmetric
1981/8/11: 110881 = 110:881 = each is up-down mirror symmetric
1981/8/11: 11881 = up-down mirror symmetric
1981/8/11: 810811 = up-down mirror symmetric
1981/8/11: 810811 = 81:08:11 = each is up-down mirror symmetric
1981/8/11: 810811 = 810:811 = each is up-down mirror symmetric
1981/8/11: 81181 = up-down mirror symmetric
1981/8/11: 81811 = up-down mirror symmetric
1981/8/18: 081881 = up-down mirror symmetric
1981/8/18: 081881 = 08:18:81 = each is up-down mirror symmetric
1981/8/18: 081881 = 081:881 = each is up-down mirror symmetric
1981/8/18: 180881 = up-down mirror symmetric
1981/8/18: 180881 = 18:08:81 = each is up-down mirror symmetric
1981/8/18: 180881 = 180:881 = each is up-down mirror symmetric
1981/8/18: 18881 = palindrome
1981/8/18: 18881 = left-right mirror symmetric
1981/8/18: 18881 = up-down mirror symmetric
1981/8/18: 810818 = up-down mirror symmetric
1981/8/18: 810818 = 81:08:18 = each is up-down mirror symmetric
1981/8/18: 810818 = 810:818 = each is up-down mirror symmetric
1981/8/18: 81818 = palindrome
1981/8/18: 81818 = left-right mirror symmetric
1981/8/18: 81818 = up-down mirror symmetric
1981/8/18: 81881 = up-down mirror symmetric
1981/9/1: 010981 = 01:09:81 = geometric series of ratio 9
1981/9/1: 090181 = 090:181 = each is palindrome
1981/9/1: 810901 = 81:09:01 = geometric series of ratio 0.111111111111111
1981/9/8: 198198 = cyclic permutation symmetric
1981/9/8: 981981 = cyclic permutation symmetric
1981/9/18: 1891981 = palindrome
1981/9/18: 18981 = palindrome
1981/9/18: 81918 = palindrome
1981/9/27: 092781 = 09:27:81 = geometric series of ratio 3
1981/10/1: 011081 = up-down mirror symmetric
1981/10/1: 011081 = 01:10:81 = each is up-down mirror symmetric
1981/10/1: 011081 = 011:081 = each is up-down mirror symmetric
1981/10/1: 100181 = up-down mirror symmetric
1981/10/1: 100181 = 10:01:81 = each is up-down mirror symmetric
1981/10/1: 100181 = 100:181 = each is up-down mirror symmetric
1981/10/1: 10181 = up-down mirror symmetric
1981/10/1: 11081 = up-down mirror symmetric
1981/10/1: 811001 = up-down mirror symmetric
1981/10/1: 811001 = 81:10:01 = each is up-down mirror symmetric
1981/10/1: 811001 = 811:001 = integer ratio of 811 to 1
1981/10/1: 811001 = 811:001 = each is up-down mirror symmetric
1981/10/1: 81101 = up-down mirror symmetric
1981/10/8: 081081 = up-down mirror symmetric
1981/10/8: 081081 = cyclic permutation symmetric
1981/10/8: 081081 = 08:10:81 = each is up-down mirror symmetric
1981/10/8: 081081 = 081:081 = each is up-down mirror symmetric
1981/10/8: 100881 = up-down mirror symmetric
1981/10/8: 100881 = 10:08:81 = each is up-down mirror symmetric
1981/10/8: 100881 = 100:881 = each is up-down mirror symmetric
1981/10/8: 10881 = up-down mirror symmetric
1981/10/8: 81081 = up-down mirror symmetric
1981/10/8: 811008 = up-down mirror symmetric
1981/10/8: 811008 = 81:10:08 = each is up-down mirror symmetric
1981/10/8: 811008 = 811:008 = each is up-down mirror symmetric
1981/10/8: 81108 = up-down mirror symmetric
1981/10/10: 101081 = up-down mirror symmetric
1981/10/10: 101081 = 10:10:81 = each is up-down mirror symmetric
1981/10/10: 101081 = 101:081 = each is up-down mirror symmetric
1981/10/10: 811010 = up-down mirror symmetric
1981/10/10: 811010 = 81:10:10 = each is up-down mirror symmetric
1981/10/10: 811010 = 811:010 = each is up-down mirror symmetric
1981/10/11: 101181 = up-down mirror symmetric
1981/10/11: 101181 = 10:11:81 = each is up-down mirror symmetric
1981/10/11: 101181 = 101:181 = each is left-right mirror symmetric
1981/10/11: 101181 = 101:181 = each is palindrome
1981/10/11: 101181 = 101:181 = each is up-down mirror symmetric
1981/10/11: 111081 = up-down mirror symmetric
1981/10/11: 111081 = 11:10:81 = each is up-down mirror symmetric
1981/10/11: 111081 = 111:081 = each is up-down mirror symmetric
1981/10/11: 811011 = up-down mirror symmetric
1981/10/11: 811011 = 81:10:11 = each is up-down mirror symmetric
1981/10/11: 811011 = 811:011 = each is up-down mirror symmetric
1981/10/18: 101881 = up-down mirror symmetric
1981/10/18: 101881 = 10:18:81 = each is up-down mirror symmetric
1981/10/18: 101881 = 101:881 = each is up-down mirror symmetric
1981/10/18: 181081 = up-down mirror symmetric
1981/10/18: 181081 = 18:10:81 = each is up-down mirror symmetric
1981/10/18: 181081 = 181:081 = each is up-down mirror symmetric
1981/10/18: 811018 = up-down mirror symmetric
1981/10/18: 811018 = 81:10:18 = each is up-down mirror symmetric
1981/10/18: 811018 = 811:018 = each is up-down mirror symmetric
1981/11/1: 011181 = up-down mirror symmetric
1981/11/1: 011181 = 01:11:81 = each is up-down mirror symmetric
1981/11/1: 011181 = 011:181 = each is up-down mirror symmetric
1981/11/1: 110181 = up-down mirror symmetric
1981/11/1: 110181 = 11:01:81 = each is up-down mirror symmetric
1981/11/1: 110181 = 110:181 = each is up-down mirror symmetric
1981/11/1: 11181 = up-down mirror symmetric
1981/11/1: 811101 = up-down mirror symmetric
1981/11/1: 811101 = 81:11:01 = each is up-down mirror symmetric
1981/11/1: 811101 = 811:101 = each is up-down mirror symmetric
1981/11/1: 81111 = up-down mirror symmetric
1981/11/8: 081181 = up-down mirror symmetric
1981/11/8: 081181 = 08:11:81 = each is up-down mirror symmetric
1981/11/8: 081181 = 081:181 = each is up-down mirror symmetric
1981/11/8: 110881 = up-down mirror symmetric
1981/11/8: 110881 = 11:08:81 = each is up-down mirror symmetric
1981/11/8: 110881 = 110:881 = each is up-down mirror symmetric
1981/11/8: 11881 = up-down mirror symmetric
1981/11/8: 811108 = up-down mirror symmetric
1981/11/8: 811108 = 81:11:08 = each is up-down mirror symmetric
1981/11/8: 811108 = 811:108 = each is up-down mirror symmetric
1981/11/8: 81118 = palindrome
1981/11/8: 81118 = left-right mirror symmetric
1981/11/8: 81118 = up-down mirror symmetric
1981/11/8: 81181 = up-down mirror symmetric
1981/11/10: 101181 = up-down mirror symmetric
1981/11/10: 101181 = 10:11:81 = each is up-down mirror symmetric
1981/11/10: 101181 = 101:181 = each is left-right mirror symmetric
1981/11/10: 101181 = 101:181 = each is palindrome
1981/11/10: 101181 = 101:181 = each is up-down mirror symmetric
1981/11/10: 111081 = up-down mirror symmetric
1981/11/10: 111081 = 11:10:81 = each is up-down mirror symmetric
1981/11/10: 111081 = 111:081 = each is up-down mirror symmetric
1981/11/10: 811110 = up-down mirror symmetric
1981/11/10: 811110 = 81:11:10 = each is up-down mirror symmetric
1981/11/10: 811110 = 811:110 = each is up-down mirror symmetric
1981/11/11: 111181 = up-down mirror symmetric
1981/11/11: 111181 = 11:11:81 = each is up-down mirror symmetric
1981/11/11: 111181 = 111:181 = each is left-right mirror symmetric
1981/11/11: 111181 = 111:181 = each is palindrome
1981/11/11: 111181 = 111:181 = each is up-down mirror symmetric
1981/11/11: 811111 = up-down mirror symmetric
1981/11/11: 811111 = 81:11:11 = each is up-down mirror symmetric
1981/11/11: 811111 = 811:111 = each is up-down mirror symmetric
1981/11/12: 121181 = 121:181 = each is palindrome
1981/11/13: 131181 = 131:181 = each is palindrome
1981/11/14: 141181 = 141:181 = each is palindrome
1981/11/15: 151181 = 151:181 = each is palindrome
1981/11/16: 161181 = 161:181 = each is palindrome
1981/11/17: 171181 = 171:181 = each is palindrome
1981/11/18: 111881 = up-down mirror symmetric
1981/11/18: 111881 = 11:18:81 = each is up-down mirror symmetric
1981/11/18: 111881 = 111:881 = each is up-down mirror symmetric
1981/11/18: 181181 = palindrome
1981/11/18: 181181 = left-right mirror symmetric
1981/11/18: 181181 = up-down mirror symmetric
1981/11/18: 181181 = cyclic permutation symmetric
1981/11/18: 181181 = 18:11:81 = each is up-down mirror symmetric
1981/11/18: 181181 = 181:181 = each is left-right mirror symmetric
1981/11/18: 181181 = 181:181 = each is palindrome
1981/11/18: 181181 = 181:181 = each is up-down mirror symmetric
1981/11/18: 811118 = palindrome
1981/11/18: 811118 = left-right mirror symmetric
1981/11/18: 811118 = up-down mirror symmetric
1981/11/18: 811118 = 81:11:18 = each is up-down mirror symmetric
1981/11/18: 811118 = 811:118 = each is up-down mirror symmetric
1981/11/19: 191181 = 191:181 = each is palindrome
1981/12/11: 121181 = 121:181 = each is palindrome
1981/12/28: 281281 = cyclic permutation symmetric