A113344 Column 4 of triangle A113340, also equals column 0 of A113340^9.

1, 9, 117, 1881, 36051, 805875, 20661609, 599319747, 19443585048, 698723462022, 27583235473854, 1187660855613822, 55430739480692085, 2789074498460404927, 150571050665946174760, 8684625004973955639293, 533144024633105768180154

Offset: 0

Author

Paul D. Hanna, Nov 08 2005

Keywords

• nonn

Crossrefs

Cf. A113341 (column 1), A113342 (column 2), A113343 (column 3), A113340.

Programs

PARI

a(n)=local(A,B);A=matrix(1,1);A[1,1]=1;for(m=2,n+5,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+5,5]