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 A030258 #8 Mar 30 2012 17:37:00 %S A030258 1,1,1,3,164,80461 %N A030258 Number of nonisomorphic commutative idempotent groupoids with no symmetry. %H A030258 <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a> %K A030258 nonn,more %O A030258 0,4 %A A030258 _Christian G. Bower_