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A102104 Row sums of triangular matrix A102101, which shifts upward to exclude the main diagonal under matrix fourth power. 1
1, 3, 34, 2125, 399551, 167436757, 133589812359, 182634217743739, 396471609861950572, 1290175805332297239092, 6016194958934722148801658, 38771533093655782191893463830, 335219158226849230801472869515158 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

PROG

(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^4)[i-1, 1], B[i, j]=(A^4)[i-1, j])); )); A=B); return(sum(k=0, n, A[n+1, k+1]))}

CROSSREFS

Cf. A102101.

Sequence in context: A054783 A222892 A324234 * A194890 A197434 A194891

Adjacent sequences:  A102101 A102102 A102103 * A102105 A102106 A102107

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 29 2004

STATUS

approved

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Last modified March 20 09:50 EDT 2019. Contains 321345 sequences. (Running on oeis4.)