id:A056366 - OEIS Search Results

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

+0
1

0, 1, 1, 2, 3, 5, 8, 14, 21, 39, 62, 112, 189, 352, 607, 1144, 2055, 3885, 7154, 13602, 25472, 48670, 92204, 176770, 337590, 649341, 1246840, 2404872, 4636389, 8964143, 17334800 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`Turning over will not create a new bracelet. Permuting the colors of the beads will not change the structure. Identical to A000046 for n>1.`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`A000046(n)-A000007(n-1).`
	CROSSREFS	`Cf. A056303.` `Sequence in context: A082931 A034413 A034416 this_sequence A000046 A131132 A004692` `Adjacent sequences: A056363 A056364 A056365 this_sequence A056367 A056368 A056369`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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