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A032139 "CFK" (necklace, size, unlabeled) transform of 2,2,2,2... 1

%I

%S 1,2,2,6,6,10,26,30,46,66,178,198,326,442,666,1566,1886,2882,4082,

%T 5942,8006,18426,21450,33502,45854,67314,89074,128310,252406,309498,

%U 459914,635470,904350,1214514,1702562,2240246,4261430

%N "CFK" (necklace, size, unlabeled) transform of 2,2,2,2...

%H Andrew Howroyd, <a href="/A032139/b032139.txt">Table of n, a(n) for n = 0..1000</a>

%H C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>

%H <a href="/index/Lu#Lyndon">Index entries for sequences related to Lyndon words</a>

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

%K nonn

%O 0,2

%A _Christian G. Bower_

%E a(0)=1 prepended by _Andrew Howroyd_, Jun 21 2018

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Last modified April 5 09:46 EDT 2020. Contains 333239 sequences. (Running on oeis4.)