A032062 "BGK" (reversible, element, unlabeled) transform of 2,1,1,1,...

1, 2, 2, 3, 6, 7, 13, 26, 32, 48, 78, 154, 187, 287, 392, 615, 1104, 1399, 2023, 2822, 3938, 5592, 9744, 12010, 17437, 23519, 32810, 43167, 61734, 96895, 123049, 171206, 230504, 312588, 413394, 555082, 739195, 1133051, 1410680

Offset

0,2

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+(1 + x*y)*prod(k=1, n, 1 + x^k*y + O(x*x^n)))] \\ Andrew Howroyd, Sep 13 2018

Crossrefs

Sequence in context: A106369 A298436 A228577 * A303028 A011141 A159915

Adjacent sequences: A032059 A032060 A032061 * A032063 A032064 A032065

Keyword

nonn

Author

Christian G. Bower

Extensions

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

Status

approved