id:A093331 - OEIS Search Results

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Number of ternary necklaces of length n with no subsequence 00.

+0
1

2, 5, 8, 17, 32, 76, 164, 398, 948, 2336, 5756, 14460, 36344, 92282, 235120, 602348, 1548320, 3995602, 10340300, 26838896, 69830576, 182111414, 475898036, 1246011050, 3267979208, 8584907756, 22585675348, 59501499506, 156955442072 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = (1/n)sum_{d divides n } totient(n/d)A080040(d).`
	CROSSREFS	`Sequence in context: A034445 A054754 A054755 this_sequence A162216 A032158 A103745` `Adjacent sequences: A093328 A093329 A093330 this_sequence A093332 A093333 A093334`
	KEYWORD	`easy,nonn`
	AUTHOR	`DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Apr 25 2004`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

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