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A102103 Column 1 of triangular matrix A102101, which shifts upward to exclude the main diagonal under matrix fourth power. 1
0, 2, 16, 1040, 196080, 82196224, 65585046960, 89664824687968, 194650170795350624, 633421180929983545024, 2953697281799409438455088, 19035190329068182887341039344, 164578521474330559730154886587328 (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(A[n+1, 2])}

CROSSREFS

Cf. A102101.

Sequence in context: A273193 A002543 A125791 * A060597 A091479 A016031

Adjacent sequences:  A102100 A102101 A102102 * A102104 A102105 A102106

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 29 2004

STATUS

approved

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Last modified March 22 04:32 EDT 2019. Contains 321406 sequences. (Running on oeis4.)