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 A171702 #34 Apr 22 2016 09:53:16 %S A171702 5,26,121,300,1009,1477,4591,15049,35101,35101,83161,176401,291721, %T A171702 291721,720721,1081081,1496881,2106721,3341521,3341521,5654881, %U A171702 7207201,8648641,10810801,13693681,15135121,21621601,28274401,28274401,41081041,41081041,41081041 %N A171702 The first number that is (at least) n-fold intrinsically 3-palindromic (represented in base ten). %H A171702 Giovanni Resta, <a href="/A171702/b171702.txt">Table of n, a(n) for n = 1..100</a> [terms a(1)-a(38) computed by Hiroaki Yamanouchi; a(39)-a(100) by _Giovanni Resta_, Apr 22 2016] %e A171702 a(1)=5 is 101 in base 2. %e A171702 a(2)=26 is 222 in base 3 and 101 in base 5. %e A171702 a(3)=121 is 232 in base 7 and 171 in base 8. %Y A171702 Cf. A171701, A171703, A171704, A171705, A171706, A171740, A171741, A171742. %K A171702 nonn,base %O A171702 1,1 %A A171702 _James G. Merickel_, Dec 15 2009 %E A171702 a(21)-a(32) from _Hiroaki Yamanouchi_, Sep 20 2014