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 A030259 #8 Mar 30 2012 17:37:00 %S A030259 0,0,0,4,38,1894 %N A030259 Number of nonisomorphic commutative idempotent groupoids with a nontrivial symmetry. %H A030259 <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a> %Y A030259 A030257 - A030258. %K A030259 nonn,more %O A030259 0,4 %A A030259 _Christian G. Bower_