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A136468 Column 1 of triangle A136467 (scaled): a(n) = A136467(n+1,1)/2^n. 2
1, 2, 8, 106, 4728, 697288, 341056672, 561635549128, 3172355531357504, 62573893999774791616, 4377792727679018712191744, 1100465546170585425117622597248, 1004426091768772936789017838438890496 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 18 06:02 EDT 2021. Contains 345098 sequences. (Running on oeis4.)