A113373 - OEIS

A113373

Column 3 of triangle A113370, also equals column 0 of A113370^10.

1, 10, 190, 4945, 163705, 6617605, 317416204, 17677189426, 1123660618048, 80411135580587, 6405386721320372, 562632770359355432, 54061761393693393203, 5643864294810397451552, 636388356169482970183598

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OFFSET

0,2

COMMENTS

Column k of A113370 = column 0 of A113370^(3*k+1) for k>=0.

LINKS

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

PROG

(PARI) a(n)=local(A, B); A=Mat(1); for(m=2, n+4, B=matrix(m, m); for(i=1, m, for(j=1, i, if(i<3 || j==i || j>m-1, B[i, j]=1, if(j==1, B[i, 1]=1, B[i, j]=(A^(3*j-2))[i-j+1, 1])); )); A=B); A[n+4, 4]

CROSSREFS

Cf. A113370, A113371 (column 1), A113372 (column 2).

Sequence in context: A033714 A169959 A131521 * A211826 A144772 A045756

Adjacent sequences: A113370 A113371 A113372 * A113374 A113375 A113376

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 13 2005

STATUS

approved