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 A113733 #2 Mar 30 2012 17:27:47 %S A113733 1,2,4,5,11,13,33,37,61,73,157,193,277,313,397,421,457,541,613,661, %T A113733 673,733,757,877,997,1093,1153,1201,1213,1237,1321,1381,1453,1621, %U A113733 1657,1753,1873,1933,1993,2017,2137,2341,2473,2557,2593,2797,2857,2917 %N A113733 Where records occur in A111273. %Y A113733 Cf. A111273, A113732. %K A113733 nonn %O A113733 1,2 %A A113733 _Klaus Brockhaus_, Nov 08 2005