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 A132611 #4 Jul 29 2014 20:41:49
%S A132611 1,1,2,14,194,4114,118042,4274612,186932958,9577713250,562450162646,
%T A132611 37232881004442,2742420824107648,222414345991567630,
%U A132611 19691735781407563460,1889658596054736522248,195353325211864635176182,21643625444562045727620930
%N A132611 Column 0 of triangle A132610.
%C A132611 Triangle T=A132610 is generated by even matrix powers of itself such that row n+1 of T = row n of T^(2n) with appended '1' for n>=0 with T(0,0)=1.
%o A132611 (PARI) {a(n)=local(k=0,A=vector(n+1), p); A[1]=1; for(j=1, n-k-1, p=(n-1)^2-(n-j-1)^2; A=Vec((Polrev(A)+x*O(x^p))/(1-x))); A=Vec((Polrev(A)+x*O(x^p))/(1-x)); A[p+1]}
%o A132611 for(n=0,25,print1(a(n),", "))
%o A132611 (PARI) {a(n)=local(A=[1]);for(i=1,n,A=Vec(Ser(A)/(1-x)^(2*(#A)-3));A=concat(A,A[#A]));A[#A]}
%o A132611 for(n=0,25,print1(a(n),", "))
%Y A132611 Cf. A132610 (triangle); other columns: A132612, A132613; A132614.
%K A132611 nonn
%O A132611 0,3
%A A132611 _Paul D. Hanna_, Aug 23 2007