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 A058145 #6 Mar 30 2012 17:37:11 %S A058145 1,3,9,28,131,1081 %N A058145 Number of self-converse monoids of order n with 2 idempotents. %H A058145 <a href="/index/Mo#monoids">Index entries for sequences related to monoids</a> %Y A058145 Column 2 of A058144. %K A058145 nonn,more %O A058145 2,2 %A A058145 _Christian G. Bower_, Nov 14 2000