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%I #10 Nov 03 2019 16:04:04
%S 1,1,0,1,2,8,17,52,130,363,968,2684,7338,20440,56836,159424,448130,
%T 1266080,3586479,10195276,29054568,83018624,237729932,682196948,
%U 1961301330,5648590728,16293970840,47071589049,136171269780,394427456120,1143839302904,3320824711204
%N Number of n-bead necklace structures which are not self-equivalent under a nonzero rotation using a maximum of three different colored beads.
%C Permuting the colors does not change the structure.
%H Andrew Howroyd, <a href="/A328742/b328742.txt">Table of n, a(n) for n = 0..200</a>
%F a(n) = Sum_{k=1..3} A327693(n, k) for n > 0.
%F a(p) = A002075(p) for prime p >= 5.
%Y Cf. A002075, A002076, A327693, A328740.
%K nonn
%O 0,5
%A _Andrew Howroyd_, Oct 26 2019