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A136173 Column 2 of triangle A136170. 3

%I #4 Jun 13 2015 10:28:04

%S 1,3,25,480,20657,1906051,378639419,163267272113,155845755656250,

%T 335843460383424796,1664976879959626195703,19289660262281670383124691,

%U 529079225669745804554669074826,34719352972951195290492954195861372

%N Column 2 of triangle A136170.

%o (PARI) /* Generate using matrix power method: */ a(n)=local(A=Mat(1), B); for(m=1, n+3, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i, B[i, j]=1, B[i, j]=(A^(fibonacci(i-1)))[i-1, j]); )); A=B); return( ((A)[n+3, 3]))

%o (PARI) /* Generate using partial sums method: */ a(n)=local(A=vector(n+1), p); A[1]=1; for(j=1, n, p=fibonacci(n+4)-fibonacci(n-j+4)-j; A=Vec((Polrev(A)+x*O(x^p))/(1-x))); A[ #A]

%Y Cf. A136170, A136171, A136172.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 17 2007

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)