A136468 Column 1 of triangle A136467 (scaled): a(n) = A136467(n+1,1)/2^n.

1, 2, 8, 106, 4728, 697288, 341056672, 561635549128, 3172355531357504, 62573893999774791616, 4377792727679018712191744, 1100465546170585425117622597248, 1004426091768772936789017838438890496

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Prog

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

Crossrefs

Cf. A136467; A136469.

Sequence in context: A173976 A256398 A008926 * A322643 A178171 A132523

Adjacent sequences: A136465 A136466 A136467 * A136469 A136470 A136471

Keyword

nonn

Author

Paul D. Hanna, Dec 31 2007

Status

approved