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 A116654 #2 Mar 30 2012 17:37:16 %S A116654 0,1,0,1,3,4,11,15,84,59,139,168,1232,1079 %N A116654 Number of atomic species based on even permutation groups that are not substitutions of smaller species. %F A116654 Define b(n), c(n): b(1)=c(0)=0. b(k)=a(k), k>1. c(k)=A029726(k), k>0. A116653(n) is Dirichlet convolution of b and c. %K A116654 nonn,hard %O A116654 0,5 %A A116654 _Christian G. Bower_, Feb 23 2006