A111842 - OEIS

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A111842

Row sums of triangle A111840, which shifts columns left and up under matrix cube.

1, 2, 7, 46, 595, 16444, 1048303, 162728110, 63746277967, 64594795730680, 172419318632651104, 1229463017642626881490, 23684690483668583872503679, 1244115601652916934000237966330, 179585081405174505374545193721101377

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..14.

PROG

(PARI) {a(n, q=3)=local(A=Mat(1), B); if(n<0, 0, for(m=1, n+2, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i, B[i, j]=1, if(j==1, B[i, j]=(A^q)[i-1, 1], B[i, j]=(A^q)[i-1, j-1])); )); A=B); return(sum(k=0, n, A[n+1, k+1])))}

CROSSREFS

Cf. A111840, A078125 (variant).

Sequence in context: A340450 A351917 A349640 * A247883 A027458 A062632

Adjacent sequences: A111839 A111840 A111841 * A111843 A111844 A111845

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Aug 23 2005

STATUS

approved