A113342 Column 2 of triangle A113340, also equals column 0 of A113340^5.

1, 5, 35, 325, 3880, 57560, 1030751, 21763632, 531604250, 14789895891, 462672349092, 16100666809097, 617634167482824, 25916099832677757, 1181568927574816310, 58194225186901919790, 3080529680131892318877

Offset: 0

Author

Paul D. Hanna, Nov 08 2005

Keywords

• nonn

Crossrefs

Cf. A113341 (column 1), A113343 (column 3), A113344 (column 4), A113340.

Programs

PARI

a(n)=local(A,B);A=matrix(1,1);A[1,1]=1;for(m=2,n+3,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[n+3,3]