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 A056306 Number of primitive (period n) n-bead necklace structures using exactly five different colored beads. 2
 0, 0, 0, 0, 1, 3, 20, 136, 773, 4280, 22430, 115097, 577577, 2863207, 14051163, 68515378, 332514803, 1608799915, 7767857090, 37460384315, 180536313527, 869901375049, 4192038616700, 20208367780744 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 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 Sum mu(d)*A056298(n/d) where d|n. Alternatively, A056301(n)-A056300(n).. CROSSREFS Column 5 of A107424. Cf. A056290. Sequence in context: A138910 A000276 A216778 * A056298 A114479 A074574 Adjacent sequences:  A056303 A056304 A056305 * A056307 A056308 A056309 KEYWORD nonn AUTHOR STATUS approved

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Last modified April 2 18:43 EDT 2020. Contains 333189 sequences. (Running on oeis4.)