A056349 - OEIS

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A056349

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

0, 0, 1, 6, 18, 55, 147, 405, 1083, 2961, 8043, 22182, 61278, 170883, 477910, 1344825, 3795750, 10757763, 30572427, 87146139, 248991674, 713088309, 2046303339, 5883410760, 16944543792, 48879708297 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	COMMENTS	`Turning over will not create a new bracelet.`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`sum mu(d)*A056343(n/d) where d\|n.`
	CROSSREFS	`Cf. A056288.` `Sequence in context: A099856 A007206 A183913 * A035070 A075386 A056343` `Adjacent sequences: A056346 A056347 A056348 * A056350 A056351 A056352`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified February 14 14:47 EST 2012. Contains 205623 sequences.