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 A030261 #8 Mar 30 2012 17:37:00 %S A030261 1,0,1,35,13776,83306272 %N A030261 Number of nonisomorphic commutative groupoids with no idempotents and no symmetry. %H A030261 <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a> %K A030261 nonn,more %O A030261 0,4 %A A030261 _Christian G. Bower_