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 A058146 #6 Mar 30 2012 17:37:11 %S A058146 1,6,31,160,947 %N A058146 Number of self-converse monoids of order n with 3 idempotents. %H A058146 <a href="/index/Mo#monoids">Index entries for sequences related to monoids</a> %Y A058146 Column 3 of A058144. %K A058146 nonn,more %O A058146 3,2 %A A058146 _Christian G. Bower_, Nov 14 2000