This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A261910 #13 Sep 10 2015 22:20:58 %S A261910 21,32,43,54,65,76,87,98,201,1031,1041,1042,1051,1052,1053,1061,1062, %T A261910 1063,1064,1071,1072,1073,1074,1075,1081,1082,1083,1084,1085,1086, %U A261910 1091,1092,1093,1094,1095,1096,1097,1101,1103,1104,1105,1106,1107,1108,1109,1123,1124,1125,1126,1127,1128,1129,1134,1135,1136,1137,1138,1139,1145,1146,1147,1148,1149,1153 %N A261910 Numbers n which are neither palindromes nor the sum of two palindromes, with property that subtracting the largest palindrome < n from n gives a number which is the sum of two palindromes. %C A261910 These are the numbers with palindromic order 3 (see A261913). %C A261910 More than the usual number of terms are shown in order to clarify the difference between this sequence and A035137. %H A261910 N. J. A. Sloane, <a href="/A261910/b261910.txt">Table of n, a(n) for n = 1..9937</a> %Y A261910 A subset of A035137. %Y A261910 Cf. A002113, A261675, A261911, A261912, A261913. %K A261910 nonn,base %O A261910 1,1 %A A261910 _N. J. A. Sloane_, Sep 10 2015