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A032215 "DFK" (bracelet, size, unlabeled) transform of 2,1,1,1... 1
1, 2, 1, 3, 3, 4, 6, 7, 9, 11, 19, 21, 30, 38, 50, 83, 101, 137, 183, 249, 310, 524, 618, 871, 1125, 1543, 1959, 2621, 3934, 4890, 6582, 8639, 11417, 14765, 19499, 24509, 36486, 44424, 59698, 76235, 101481, 127807, 168747, 212221, 273294 (list; graph; refs; listen; history; text; internal format)
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 + (1+2*x*y)*prod(k=2, n, 1 + x^k*y + O(x*x^n))))} \\ Andrew Howroyd, Jun 21 2018

CROSSREFS

Sequence in context: A130067 A282906 A032303 * A117363 A007307 A207617

Adjacent sequences:  A032212 A032213 A032214 * A032216 A032217 A032218

KEYWORD

nonn

AUTHOR

Christian G. Bower

EXTENSIONS

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

STATUS

approved

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Last modified October 19 20:05 EDT 2018. Contains 316378 sequences. (Running on oeis4.)