A032063 "BGK" (reversible, element, unlabeled) transform of 1,2,3,4,...

1, 1, 2, 5, 8, 18, 40, 77, 180, 378, 822, 1750, 3824, 8016, 16630, 36100, 74092, 154325, 317388, 657064, 1348688, 2732441, 5554850, 11203449, 22725376, 45309407, 90568158, 180428451, 358348728, 709098028, 1395536060

Offset

0,3

Links

Andrew Howroyd, Table of n, a(n) for n = 0..1000

C. G. Bower, Transforms (2)

Prog

(PARI) seq(n)=[subst(serlaplace(y^0*p + polcoeff(p, 1)), y, 1)/2 | p <- Vec(y-1+prod(k=1, n, (1 + x^k*y + O(x*x^n))^k))] \\ Andrew Howroyd, Sep 13 2018

Crossrefs

Sequence in context: A271619 A197211 A256723 * A320426 A133147 A358828

Adjacent sequences: A032060 A032061 A032062 * A032064 A032065 A032066

Keyword

nonn

Author

Christian G. Bower

Extensions

a(0)=1 prepended by Andrew Howroyd, Sep 13 2018

Status

approved