id:A056348 - OEIS Search Results

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Number of primitive (period n) bracelets using exactly two different colored beads.

+0
1

0, 1, 2, 3, 6, 8, 16, 24, 42, 69, 124, 208, 378, 668, 1214, 2220, 4110, 7630, 14308, 26931, 50944, 96782, 184408, 352450, 675180, 1296477, 2493680, 4805388, 9272778, 17919558, 34669600 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Turning over will not create a new bracelet. Identical to A001371 for n>1.`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`Sum mu(d)*A056342(n/d) where d divides n.`
	CROSSREFS	`Cf. A001037.` `Adjacent sequences: A056345 A056346 A056347 this_sequence A056349 A056350 A056351` `Sequence in context: A133586 A141348 A029867 this_sequence A057574 A103065 A005508`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified October 10 20:39 EDT 2008. Contains 144831 sequences.

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