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 A111187 #3 Mar 30 2012 18:39:53 %S A111187 1,5,2,10,1436,3,99,23355,21,8,4,42,161289 %N A111187 a(n) is the index of A110080 where n appears. %C A111187 a(14)>1100000 %K A111187 nonn %O A111187 1,2 %A A111187 _Hans Havermann_, Oct 19 2005, Nov 02 2005