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 A131936 #3 Mar 30 2012 18:40:43 %S A131936 1,3,12,30,148,387,1981 %N A131936 Partial sums of A006226. %Y A131936 Cf. A006226. %K A131936 nonn %O A131936 1,2 %A A131936 _Jonathan Vos Post_, Oct 05 2007