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 A133502 #5 Nov 04 2013 13:01:50 %S A133502 1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,6,3,4,4,2,2,2,4, %T A133502 3,6,6,6,5,10,2,2,3,6,4,4,5,7,4,6,2,2,4,3,4,6,4,4,3,5,2,2,7,4,5,5,4,4, %U A133502 9,3,2,2,7,7,3,3,4,6,4,3,2,2,6,4,5,5,6,5,4,8,2,2,3,6,5,3,4,4,3,5,2,2,2,2,2 %N A133502 A133501(n) + 1. %K A133502 nonn,base %O A133502 0,11 %A A133502 _J. H. Conway_ and _N. J. A. Sloane_, Dec 03 2007