A056271 - OEIS

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A056271

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

0, 0, 0, 0, 0, 720, 15120, 191520, 1905120, 16435440, 129230640, 953028720, 6711344640, 45674173440, 302899156560, 1969146930240, 12604139926560, 79694818842240, 499018753280880, 3100376788241040 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,6`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`Sum mu(d)*A000920(n/d) where d\|n.`
	CROSSREFS	`Cf. A000400, A000920, A054721.` `Sequence in context: A112002 A004033 A137891 * A000920 A052779 A037212` `Adjacent sequences: A056268 A056269 A056270 * A056272 A056273 A056274`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified February 15 20:03 EST 2012. Contains 205852 sequences.