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 A102099 #4 Mar 30 2012 18:36:44
%S A102099 0,2,8,152,6200,442552,49399320,8003532512,1784040237288,
%T A102099 525504809786112,198213959637435608,93352856625931514024,
%U A102099 53776417402985961020144,37244016639064540041311632
%N A102099 Column 1 of triangular matrix A102098, which shifts upward to exclude the main diagonal under matrix cube.
%C A102099 Column 0 of A102098 is A082162.
%o A102099 (PARI) {a(n)=local(A=matrix(2,2),B);A[1,1]=1; for(m=2,n+1,B=matrix(m,m);for(i=1,m, for(j=1,i, if(j==i,B[i,j]=j,if(j==1,B[i,j]=(A^3)[i-1,1], B[i,j]=(A^3)[i-1,j]));));A=B); return(A[n+1,2])}
%Y A102099 Cf. A102098, A082162, A102100.
%K A102099 nonn
%O A102099 0,2
%A A102099 _Paul D. Hanna_, Dec 29 2004