A113347 Column 1 of triangle A113345, also equals column 0 of A113350^3.

1, 6, 39, 327, 3556, 48659, 812462, 16136404, 373415239, 9900007028, 296557405704, 9921937128500, 367181525916035, 14906571298831661, 659191947156441025, 31558799717042019635, 1626968083690674214906

Offset: 0

Author

Paul D. Hanna, Nov 08 2005

Keywords

• nonn

Comments

A113345 is the matrix square of A113340.

Crossrefs

Cf. A113340, A113345, A113346 (column 0), A113348 (column 2), A113349 (column 3); A113350.

Programs

PARI

a(n)=local(A,B);A=matrix(1,1);A[1,1]=1;for(m=2,n+2,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+2,2]