id:A056297 - OEIS Search Results

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n-bead necklace structures using exactly four different colored beads.

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0, 0, 0, 1, 2, 13, 50, 221, 866, 3437, 13250, 51075, 194810, 742651, 2823766, 10738881, 40843370, 155494751, 592614050, 2261625725, 8643289534, 33080920607, 126797503250, 486710971595, 1870851589554 (list; graph; listen)

	OFFSET	`1,5`
	COMMENT	`Turning over the necklace is not allowed. Colors may be permuted without changing the necklace structure.`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`A056292(n)-A002076(n).`
	CROSSREFS	`Cf. A056284.` `Sequence in context: A005584 A072416 A056305 this_sequence A037383 A034476 A030517` `Adjacent sequences: A056294 A056295 A056296 this_sequence A056298 A056299 A056300`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.

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