id:A045625 - OEIS Search Results

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Number of n-bead black-white reversible strings with fundamental period n.

+0
7

1, 2, 1, 4, 7, 18, 29, 70, 126, 266, 507, 1054, 2037, 4158, 8183, 16488, 32760, 65790, 131026, 262654, 524265, 1049524, 2097119, 4196350, 8388450, 16781292, 33554367, 67116784, 134217657, 268451838, 536870247, 1073774590, 2147483520 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`Moebius transform of A005418(n+1) (Christian Bower).`
	CROSSREFS	`Sequence in context: A123242 A139769 A007839 this_sequence A001933 A038557 A011234` `Adjacent sequences: A045622 A045623 A045624 this_sequence A045626 A045627 A045628`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified September 7 12:28 EDT 2008. Contains 143483 sequences.

AT&T Labs Research