id:A045692 - OEIS Search Results

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Number of binary words of length n (beginning 0) with autocorrelation function 2^(n-1)+2.

+0
1

0, 0, 0, 1, 2, 3, 8, 13, 30, 55, 116, 221, 458, 895, 1816, 3589, 7238, 14391, 28892 (list; graph; listen)

	OFFSET	`1,5`
	FORMULA	`a[ 2n-1 ] = 2 a[ 2n-2 ] + 2 a[ n ] for n >= 3; a[ 2n ] = 2 a[ 2n-1 ] -a[ n ] - a[ n+1 ] for n >= 3`
	CROSSREFS	`Sequence in context: A004138 A116503 A105204 this_sequence A103196 A113954 A025082` `Adjacent sequences: A045689 A045690 A045691 this_sequence A045693 A045694 A045695`
	KEYWORD	`nonn`
	AUTHOR	`TORSTEN.SILLKE(AT)LHSYSTEMS.COM`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.