A113341 Column 1 of triangle A113340, also equals column 0 of A113340^3.

1, 3, 12, 69, 560, 6059, 83215, 1399161, 28020221, 654110586, 17494347067, 528556017365, 17830841841940, 665126088764191, 27208111182653865, 1211942062741823574, 58424831462907214924, 3031993693950136247986

Offset: 0

Author

Paul D. Hanna, Nov 08 2005

Keywords

• nonn

Crossrefs

Cf. A113342 (column 2), A113343 (column 3), A113344 (column 4), A113340, A113360 (=A113340^3).

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[n+2,2]