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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
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: A324234 A366137 A337069 * A194890 A197434 A194891
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 29 2004
STATUS
approved