A102104 - OEIS

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A102104

Row sums of triangular matrix A102101, which shifts upward to exclude the main diagonal under matrix fourth power.

1, 3, 34, 2125, 399551, 167436757, 133589812359, 182634217743739, 396471609861950572, 1290175805332297239092, 6016194958934722148801658, 38771533093655782191893463830, 335219158226849230801472869515158 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	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: A077144 A101633 A054783 * A194890 A197434 A194891` `Adjacent sequences: A102101 A102102 A102103 * A102105 A102106 A102107`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Dec 29 2004`

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Last modified February 14 15:39 EST 2012. Contains 205635 sequences.