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%I #9 Sep 13 2018 15:45:53
%S 1,2,3,6,11,18,37,66,113,222,375,674,1195,2170,3589,6126,11173,18202,
%T 31543,51098,87675,147222,241721,390426,635365,1065762,1687559,
%U 2774262,4369023,6947858,11065897,17908786,27866053
%N "CGK" (necklace, element, unlabeled) transform of 2,2,2,2,...
%H Andrew Howroyd, <a href="/A032156/b032156.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)=[subst(serlaplace(p/y),y,1) | p <- Vec(y-1+prod(k=1, n, 1 + x^k*y + O(x*x^n))^2)] \\ _Andrew Howroyd_, Sep 13 2018
%K nonn
%O 0,2
%A _Christian G. Bower_
%E a(0)=1 prepended by _Andrew Howroyd_, Sep 13 2018
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