%I
%S 1,1,2,5,11,38,122,496,2005,8707,38364,173562,792827,3662800,17034367,
%T 79702578,374624253,1767881397,8370666416,39751064122,189262621739,
%U 903220020390,4319518316898,20697040024784
%N Number of primitive (period n) nbead necklace structures using a maximum of five different colored beads.
%C Turning over the necklace is not allowed. Colors may be permuted without changing the necklace structure.
%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 a(n) = Sum_{dn} mu(d) * A056293(n/d); mu = A008683.
%Y Cf. A001692, A008683.
%K nonn
%O 1,3
%A _Marks R. Nester_
