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

1,2

Links

Table of n, a(n) for n=1..13.

Prog

(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]))}

Crossrefs

Cf. A113084.

Sequence in context: A258180 A072754 A225609 * A058153 A020197 A102959

Adjacent sequences: A113083 A113084 A113085 * A113087 A113088 A113089

Keyword

nonn

Author

Paul D. Hanna, Oct 14 2005

Status

approved