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 A216903 #9 Sep 28 2012 13:24:32 %S A216903 27924649,130535031,952404259,8755399858,17207421669,78641539396, %T A216903 153703346251,302665883230,1141282588378,1408219987879 %N A216903 Smallest palindromic number of 9 digits in two bases differing by n. %C A216903 See comments to A216840 and A216841. Smaller bases of pair are 7, 8, 10, 13, 14, 17, 18, 19, 22, 23. Other sequences directly connected with this one are the A216*** cross-references, while the A171*** ones are various record multi-base palindromes. %e A216903 The first term is 456232654 in base 7 and is 152414251 in base 8. %Y A216903 Cf. A171701, A171702, A171703, A171704, A171705, A171706, A171740, A171741, A171742, A171775, A216840, A216841, A216843, A216899, A216900, A216901, A216902, A216904, A216905, A216906, A216907, A216908, A216909, A216910. %K A216903 nonn,base %O A216903 1,1 %A A216903 _James G. Merickel_, Sep 19 2012