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 A058111 #6 Mar 30 2012 17:37:11 %S A058111 10,72,590,5422,61323 %N A058111 Number of semigroups of order n with 3 idempotents. %H A058111 <a href="/index/Se#semigroups">Index entries for sequences related to semigroups</a> %Y A058111 Column 3 of A058108. %K A058111 nonn,hard %O A058111 3,1 %A A058111 _Christian G. Bower_, Nov 09 2000 %E A058111 Updated Feb 19 2001