id:A056368 - OEIS Search Results

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

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0, 0, 0, 1, 2, 11, 33, 136, 478, 1849, 6845, 26136, 98406, 373977, 1416249, 5380770, 20440250, 77794939, 296384565, 1131009781, 4321964735, 16541268223, 63400061153, 243358777620, 935431121460, 3600520732809 (list; graph; listen)

	OFFSET	`1,5`
	COMMENT	`Turning over will not create a new bracelet. Permuting the colors of the beads will not change the structure.`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`A056363(n)-A056362(n).`
	CROSSREFS	`Cf. A056305.` `Sequence in context: A085786 A034128 A034427 this_sequence A056359 A088306 A100109` `Adjacent sequences: A056365 A056366 A056367 this_sequence A056369 A056370 A056371`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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