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 A132619 #2 Mar 30 2012 18:37:04
%S A132619 1,1,5,54,940,22917,722530,28009490,1289854644,68827561580,
%T A132619 4176770296181,284087018905946,21406395137288400,1770085307452770344,
%U A132619 159359206078637624790,15516776721991034328250
%N A132619 Column 1 of triangle A132615 divided by twice the row index less 1.
%C A132619 Triangle T=A132615 is generated by odd matrix powers of itself such that row n+1 of T = row n of T^(2n-1) with appended '1' for n>=0 with T(0,0)=1.
%F A132619 a(n) = A132615(n+1,1)/(2n-1) = A132617(n)/(2n-1) for n>=1.
%o A132619 (PARI) {a(n)=local(A=vector(n+1), p); A[1]=1; for(j=1, n-1, p=n*(n-1)-(n-j)*(n-j-1); A=Vec((Polrev(A)+x*O(x^p))/(1-x))); A=Vec((Polrev(A)+x*O(x^p))/(1-x)); A[p+1]/(2*n-1)}
%Y A132619 Cf. A132615 (triangle); columns: A132616, A132617, A132618.
%K A132619 nonn
%O A132619 0,3
%A A132619 _Paul D. Hanna_, Aug 24 2007