id:A032321 - OEIS Search Results

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Number of aperiodic necklaces with n labeled beads of 2 colors.

+0
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2, 2, 12, 72, 720, 6480, 90720, 1209600, 20321280, 359251200, 7424524800, 160465536000, 3923023104000, 101213996083200, 2853345470976000, 85364982743040000, 2742350070620160000, 93039294691639296000 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`C. G. Bower, Transforms (2)` `Index entries for sequences related to Lyndon words`
	FORMULA	`"CHJ" (necklace, identity, labeled) transform of 2, 0, 0, 0...` `n! * A001037.`
	CROSSREFS	`Sequence in context: A087131 A131444 A013315 this_sequence A013311 A136278 A087220` `Adjacent sequences: A032318 A032319 A032320 this_sequence A032322 A032323 A032324`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net)`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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