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 A113086 #3 Mar 30 2012 18:36:51
%S A113086 1,4,33,586,23299,2166800,490872957,280082001078,412989850899863,
%T A113086 1604627387895595612,16673986511766782602033,
%U A113086 468802076619022792385223170,35999655498002937223238590342603
%N A113086 Column 1 of triangle A113084, which satisfies the recurrence: A113084(n,k) = [A113084^3](n-1,k-1) + [A113084^3](n-1,k).
%o A113086 (PARI) {a(n)=local(M=matrix(n+1,n+1));for(r=1,n+1, for(c=1,r, M[r,c]=if(r==c,1,if(c>1,(M^3)[r-1,c-1])+(M^3)[r-1,c]))); return(if(n<1,0,M[n+1,2]))}
%Y A113086 Cf. A113084.
%K A113086 nonn
%O A113086 1,2
%A A113086 _Paul D. Hanna_, Oct 14 2005