A113086 Column 1 of triangle A113084, which satisfies the recurrence: A113084(n,k) = [A113084^3](n-1,k-1) + [A113084^3](n-1,k).

1, 4, 33, 586, 23299, 2166800, 490872957, 280082001078, 412989850899863, 1604627387895595612, 16673986511766782602033, 468802076619022792385223170, 35999655498002937223238590342603

Offset: 1

Author

Paul D. Hanna, Oct 14 2005

Keywords

• nonn

Crossrefs

Cf. A113084.

Programs

PARI

{a(n)=local(M=matrix(n+1,n+1));for(r=1,n+1, for(c=1,r, M[r,c]=if(r==c,1,if(c>1,(M^3)[r-1,c-1])+(M^3)[r-1,c]))); return(if(n<1,0,M[n+1,2]))}