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 A058150 #6 Mar 30 2012 17:37:11 %S A058150 1,1,1,0,3,1,0,6,6,1,0,10,24,13,2,0,32,87,87,36,5,0,157,350,486,347, %T A058150 128,18,0 %N A058150 Triangle: Number of asymmetric commutative monoids of order n with k idempotents. %H A058150 <a href="/index/Mo#monoids">Index entries for sequences related to monoids</a> %e A058150 1; 1,1; 0,3,1; 0,6,6,1; 0,10,24,13,2; ... %Y A058150 Row sums give A058134. %K A058150 nonn,tabl,more %O A058150 1,5 %A A058150 _Christian G. Bower_, Nov 14 2000