Search: id:A132613
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%I A132613
%S A132613 1,1,6,76,1510,41121,1424178,59857416,2957282370,167852629965,
%T A132613 10757980606208,768190770422700,60461731639747100,5199414726620992073,
%U A132613 484974399630368105130,48763257278485285019472
%N A132613 Column 2 of triangle A132610.
%C A132613 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 A132613 (PARI) {a(n)=local(A=vector(n+3), p); A[1]=1; for(j=1, n-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]}
%Y A132613 Cf. A132610 (triangle); other columns: A132611, A132612; A132614.
%Y A132613 Sequence in context: A116874 A030044 A145165 this_sequence A009763 A028979 
               A082629
%Y A132613 Adjacent sequences: A132610 A132611 A132612 this_sequence A132614 A132615 
               A132616
%K A132613 nonn
%O A132613 0,3
%A A132613 Paul D. Hanna (pauldhanna(AT)juno.com), Aug 23 2007

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