A136471 Column 1 of triangle A136470 (scaled): a(n) = A136470(n+1,1)/2^n.

1, 4, 32, 756, 57008, 14053392, 11549010240, 32284463059856, 312975732247964288, 10703164992206736756608, 1309922159165846642159232512, 580548577042594102886390324391168

Offset

0,2

Comments

Triangle T = A136470 is defined by: column 0 of T^m = {C(m*2^n, n), n>=0}.

Links

Table of n, a(n) for n=0..11.

Prog

(PARI) {a(n)=local(M=matrix(n+2, n+2, r, c, binomial(r*2^(c-1), c-1)), P); P=matrix(n+2, n+2, r, c, binomial((r+1)*2^(c-1), c-1)); (P~*M~^-1)[n+2, 2]/2^n}

Crossrefs

Cf. A136470; A136472.

Sequence in context: A222829 A134087 A132854 * A243918 A370544 A298896

Adjacent sequences: A136468 A136469 A136470 * A136472 A136473 A136474

Keyword

nonn

Author

Paul D. Hanna, Jan 01 2008

Status

approved