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

%I

%S 1,2,8,106,4728,697288,341056672,561635549128,3172355531357504,

%T 62573893999774791616,4377792727679018712191744,

%U 1100465546170585425117622597248,1004426091768772936789017838438890496

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

%o (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}

%Y Cf. A136467; A136469.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 31 2007

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Last modified July 25 13:05 EDT 2021. Contains 346290 sequences. (Running on oeis4.)