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 A030249 #8 Mar 30 2012 17:37:00 %S A030249 0,0,2,30,3187 %N A030249 Number of nonisomorphic idempotent groupoids with a nontrivial symmetry. %H A030249 <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a> %Y A030249 A030247 - A030248. %K A030249 nonn,more %O A030249 0,3 %A A030249 _Christian G. Bower_