A113346 Column 0 of triangle A113345, also equals column 0 of A113350.

1, 2, 5, 19, 113, 966, 10958, 156700, 2727794, 56306696, 1350043965, 36979531549, 1141573025172, 39272377323693, 1491452150268436, 62027842189908231, 2805631215820328992, 137199563717151509077, 7215932308408758314447

Offset: 0

Author

Paul D. Hanna, Nov 08 2005

Keywords

• nonn

Comments

A113345 is the matrix square of A113340.

Crossrefs

Cf. A113340, A113345, A113347 (column 1), 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+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^(2*j-1))[i-j+1,1]));));A=B);(A^2)[n+1,1]