A111842 - OEIS

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