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 A113464 #3 Mar 30 2012 17:38:08 %S A113464 1,1,2,2,8,23,24,103,304,324,8,1024,1024,5096,5096,37548,83520,171360, %T A113464 530424 %N A113464 First column of triangle A113463. %Y A113464 Cf. A087308, A113463. %K A113464 nonn,less %O A113464 1,3 %A A113464 _David Wasserman_, Jan 08 2006