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 A058151 #6 Mar 30 2012 17:37:11 %S A058151 1,1,1,0,3,1,0,6,6,1,0,12,25,15,2,0,62,105,104,45,6,0,676,562,658,457, %T A058151 168,24,0 %N A058151 Triangle: Number of asymmetric self-converse monoids of order n with k idempotents. %H A058151 <a href="/index/Mo#monoids">Index entries for sequences related to monoids</a> %e A058151 1; 1,1; 0,3,1; 0,6,6,1; 0,12,25,15,2; ... %Y A058151 Row sums give A058135. %K A058151 nonn,tabl,more %O A058151 1,5 %A A058151 _Christian G. Bower_, Nov 14 2000