A032232 "DGK" (bracelet, element, unlabeled) transform of 2,1,1,1,...

1, 2, 2, 3, 4, 5, 7, 11, 13, 18, 26, 43, 52, 75, 99, 147, 237, 300, 418, 571, 776, 1077, 1735, 2147, 3025, 4022, 5494, 7155, 10004, 14911, 18919, 25767, 34233, 45672, 59814, 79167, 104272, 153313, 190847, 257607, 334813, 446054

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(p/y + polcoeff(p, 1) + polcoeff(p, 2)), 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: A186425 A327662 A034395 * A378286 A175306 A359348

Adjacent sequences: A032229 A032230 A032231 * A032233 A032234 A032235

Keyword

nonn

Author

Christian G. Bower

Extensions

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

Status

approved