id:A093305 - OEIS Search Results

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Number of binary necklaces of length n with no subsequence 000.

+0
1

1, 2, 3, 4, 5, 9, 11, 19, 29, 48, 75, 132, 213, 369, 627, 1083, 1857, 3244, 5619, 9844, 17205, 30229, 53115, 93701, 165313, 292464, 517831, 918578, 1630933, 2900109, 5161443, 9197251, 16402841, 29283026, 52319379, 93558968, 167427845 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = (1/n)* sum_{d divides n } totient(n/d)*A001644(d).`
	CROSSREFS	`Sequence in context: A062096 A100797 A139441 this_sequence A065817 A084542 A038201` `Adjacent sequences: A093302 A093303 A093304 this_sequence A093306 A093307 A093308`
	KEYWORD	`easy,nonn`
	AUTHOR	`DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Apr 24 2004`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

AT&T Labs Research