id:A032239 - OEIS Search Results

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Number of identity bracelets of n beads of 2 colors.

+0
2

2, 1, 0, 0, 0, 1, 2, 6, 14, 30, 62, 127, 252, 493, 968, 1860, 3600, 6902, 13286, 25446, 48914, 93775, 180314, 346420, 666996, 1284318, 2477328, 4781007, 9240012, 17870709, 34604066, 67058880, 130084990, 252545160, 490722342 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`C. G. Bower, Transforms (2)` `F. Ruskey, Necklaces, Lyndon words, De Bruijn sequences, etc.` `Index entries for sequences related to bracelets`
	FORMULA	`"DHK" (bracelet, identity, unlabeled) transform of 2, 0, 0, 0...`
	CROSSREFS	`Sequence in context: A035172 A110174 A022909 this_sequence A057094 A047998 A017847` `Adjacent sequences: A032236 A032237 A032238 this_sequence A032240 A032241 A032242`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net)`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

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