id:A056349 - OEIS Search Results

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

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1

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; listen)

	OFFSET	`1,4`
	COMMENT	`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: A016089 A099856 A007206 this_sequence A035070 A075386 A056343` `Adjacent sequences: A056346 A056347 A056348 this_sequence A056350 A056351 A056352`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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