A032216 "DFK" (bracelet, size, unlabeled) transform of 1,2,3,4...

1, 1, 2, 5, 7, 15, 25, 43, 64, 120, 234, 348, 615, 995, 1817, 4060, 6039, 10505, 17947, 30268, 52289, 122862, 175180, 311547, 502859, 860833, 1359388, 2391385, 5262510, 7592091, 12992464, 20881955, 34210817, 54117104

Offset

0,3

Links

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

C. G. Bower, Transforms (2)

Prog

(PARI) seq(n)={apply(p->subst(serlaplace(p/y + polcoeff(p, 1) + polcoeff(p, 2)), y, 1)/2, Vec(y-1+prod(k=1, n, 1 + k*x^k*y + O(x*x^n))))} \\ Andrew Howroyd, Jun 21 2018

Crossrefs

Sequence in context: A111328 A244962 A022629 * A285290 A032141 A032045

Adjacent sequences: A032213 A032214 A032215 * A032217 A032218 A032219

Keyword

nonn

Author

Christian G. Bower

Extensions

a(0)=1 prepended by Andrew Howroyd, Jun 21 2018

Status

approved