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 A171706 #18 Aug 22 2015 06:06:40 %S A171706 65,186621,3360633 %N A171706 The first n-fold intrinsically 7-palindromic number (represented in base 10). %C A171706 Though this sequence is apt to never have many known members, its third is quite a nice coincidence for consideration. %C A171706 A029965 runs just short of space to show it, and A053780 is a totally unrelated collection of palindromes that also includes 33633 in addition to 3360633. %C A171706 a(4) > 10^17. - _Hiroaki Yamanouchi_, Aug 22 2015 %e A171706 a(2)=186621 is 3555553 in base 6 and 1405041 in base 7. %e A171706 a(3)=3360633 is 6281826 in base 9 and 1995991 in base 11. %Y A171706 Cf. A171701, A171702, A171703, A171704, A171705, A171741, A029966, A029965, A053780. %K A171706 more,nonn,bref,base %O A171706 1,1 %A A171706 _James G. Merickel_, Dec 16 2009 %E A171706 Typo in third term corrected by _James G. Merickel_, Dec 18 2009