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 A056301 Number of primitive (period n) n-bead necklace structures using a maximum of five different colored beads. 4
 1, 1, 2, 5, 11, 38, 122, 496, 2005, 8707, 38364, 173562, 792827, 3662800, 17034367, 79702578, 374624253, 1767881397, 8370666416, 39751064122, 189262621739, 903220020390, 4319518316898, 20697040024784 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Turning over the necklace is not allowed. Colors may be permuted without changing the necklace structure. REFERENCES 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] LINKS FORMULA a(n) = Sum_{d|n} mu(d) * A056293(n/d); mu = A008683. CROSSREFS Cf. A001692, A008683. Sequence in context: A074497 A131581 A195985 * A001344 A056302 A276547 Adjacent sequences:  A056298 A056299 A056300 * A056302 A056303 A056304 KEYWORD nonn AUTHOR STATUS approved

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Last modified September 17 06:16 EDT 2021. Contains 347478 sequences. (Running on oeis4.)