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 A171924 #2 Mar 30 2012 17:35:02 %S A171924 1,2,6,14,36,122,162,450,2364,4760,4818,8541,19570,44514,47448,114885, %T A171924 378956,384324,542246,1275572,1385164,3865640,4514352,5226312,6271502, %U A171924 12817002,18665964,19815336,33506604,42712210 %N A171924 Records in A031883 (positions). %Y A171924 Cf. A000959, A031883, A171923. %K A171924 nonn %O A171924 1,2 %A A171924 R. J. Mathar, Oct 23 2010 %E A171924 a(16)-a(30) from _Donovan Johnson_, Oct 24 2010