A032214 "DFK" (bracelet, size, unlabeled) transform of 2,2,2,2...

1, 2, 2, 6, 6, 10, 18, 22, 30, 42, 98, 110, 174, 234, 346, 798, 958, 1458, 2058, 2990, 4022, 9234, 10746, 16774, 22950, 33682, 44562, 64182, 126230, 154778, 229986, 317766, 452206, 607290, 851314, 1120158, 2130750, 2567162

Offset

0,2

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 + 2*x^k*y + O(x*x^n))))} \\ Andrew Howroyd, Jun 21 2018

Crossrefs

Sequence in context: A162776 A365925 A032302 * A290261 A007040 A351017

Adjacent sequences: A032211 A032212 A032213 * A032215 A032216 A032217

Keyword

nonn

Author

Christian G. Bower

Extensions

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

Status

approved