A113349 Column 3 of triangle A113345, also equals column 0 of A113350^7.

1, 14, 203, 3367, 64750, 1435497, 36312626, 1036877170, 33086963196, 1169366274321, 45412092740791, 1924418011638535, 88445828358934074, 4384910640997110602, 233384463606862044134, 13278878088344760573344

Offset

0,2

Comments

A113345 is the matrix square of A113340.

Links

Table of n, a(n) for n=0..15.

Prog

(PARI) a(n)=local(A, B); A=matrix(1, 1); A[1, 1]=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^(2*j-1))[i-j+1, 1])); )); A=B); (A^2)[n+4, 4]

Crossrefs

Cf. A113340, A113345, A113346 (column 0), A113347 (column 1), A113348 (column 2); A113350.

Sequence in context: A222586 A221830 A068769 * A109764 A349283 A333949

Adjacent sequences: A113346 A113347 A113348 * A113350 A113351 A113352

Keyword

nonn

Author

Paul D. Hanna, Nov 08 2005

Status

approved