A056270 - OEIS

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A056270

Number of primitive (aperiodic) words of length n which contain exactly five different symbols.

0, 0, 0, 0, 120, 1800, 16800, 126000, 834120, 5102880, 29607600, 165526200, 901020120, 4808987400, 25292030280, 131542740000, 678330198120, 3474970629480, 17710714165200, 89904725757000 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,5`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`Sum mu(d)*A001118(n/d) where d\|n.`
	CROSSREFS	`Cf. A000351, A001118, A054720.` `Sequence in context: A183597 A027795 A053567 * A001118 A052767 A110839` `Adjacent sequences: A056267 A056268 A056269 * A056271 A056272 A056273`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified February 15 04:59 EST 2012. Contains 205694 sequences.