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%I #6 Aug 22 2017 20:53:09
%S 0,0,1,6,18,55,147,405,1083,2961,8043,22182,61278,170883,477910,
%T 1344825,3795750,10757763,30572427,87146139,248991674,713088309,
%U 2046303339,5883410760,16944543792,48879708297
%N Number of primitive (period n) bracelets using exactly three different colored beads.
%C Turning over will not create a new bracelet.
%D M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2]
%F sum mu(d)*A056343(n/d) where d|n.
%Y Cf. A056288.
%K nonn
%O 1,4
%A _Marks R. Nester_