A113390 Column 1 of triangle A113389, also equals column 0 of A113370^6.

1, 6, 66, 1091, 24891, 737061, 27110418, 1199197442, 62240034172, 3718021355407, 251730371459590, 19076604651022143, 1601423150451641820, 147628858305489901288, 14834881996161804192069

Offset

0,2

Links

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

Formula

Column k of A113389 = column 0 of A113370^(3*k+3) for k>=0.

Prog

(PARI) a(n)=local(A, B); A=Mat(1); for(m=2, n+1, 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^6)[n+1, 1]

Crossrefs

Cf. A113389, A113378 (column 0), A113391 (column 2), A113370.

Sequence in context: A359462 A264407 A112942 * A267080 A229002 A376098

Adjacent sequences: A113387 A113388 A113389 * A113391 A113392 A113393

Keyword

nonn

Author

Paul D. Hanna, Nov 14 2005

Status

approved