A134089 a(n) = [x^n] G(x)^(2^(n+1))/2^n where G(x) satisfies: [x^(n+1)] G(x)^(2^n) = [x^n] G(x)^(2^n) for n>=0 and G(2x) is the g.f. of A134084.

1, 2, 8, 84, 2676, 275700, 94775156, 111378681460, 457034829332596, 6660551038769802356, 349287637698829559108724, 66597190541338218944629998708, 46556095585511177615107782087451764

Offset

0,2

Links

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

Formula

a(n) = A134087(n)/2^n.

Prog

(PARI) {a(n)=local(A=[1], B); for(i=1, n, A=concat(A, 0); B=Vec(Ser(A)^(2^(#A-2))); A[ #A]=(B[ #B-1]-B[ #B])/2^(#A-2)); Vec(Ser(A)^(2^(n+1)))[n+1]/2^n}

Crossrefs

Cf. A134084, A134085, A134086, A134087, A134088.

Sequence in context: A276488 A295764 A261683 * A136647 A306001 A261730

Adjacent sequences: A134086 A134087 A134088 * A134090 A134091 A134092

Keyword

nonn

Author

Paul D. Hanna, Oct 26 2007

Status

approved