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A032252 "DHK" (bracelet, identity, unlabeled) transform of 2,1,1,1,... 1
1, 2, 2, 3, 4, 7, 17, 39, 102, 258, 651, 1620, 4028, 9956, 24588, 60742, 150108, 371689, 921822, 2291257, 5706077, 14240518, 35607189, 89202758, 223857382, 562716179, 1416686294, 3571809027, 9017514253, 22794726763 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..500

C. G. Bower, Transforms (2)

PROG

(PARI)

DHK(p, n)={my(q=((1+p)^2/(1-subst(p, x, x^2))-1)/2); p + (p^2-subst(p, x, x^2))/2 + sum(d=1, n, moebius(d)*(log(subst(1/(1+O(x*x^(n\d))-p), x, x^d))/d - subst(q + O(x*x^(n\d)), x, x^d)))/2}

seq(n)={Vec(1 + DHK(x+x/(1-x) + O(x*x^n), n))} \\ Andrew Howroyd, Sep 21 2018

CROSSREFS

Sequence in context: A281723 A011784 A302487 * A112708 A147558 A032243

Adjacent sequences:  A032249 A032250 A032251 * A032253 A032254 A032255

KEYWORD

nonn

AUTHOR

Christian G. Bower

EXTENSIONS

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

STATUS

approved

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Last modified October 21 17:10 EDT 2018. Contains 316427 sequences. (Running on oeis4.)