id:A045691 - OEIS Search Results

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

+0
1

0, 1, 1, 3, 5, 11, 19, 41, 77, 159, 307, 625, 1231, 2481, 4921, 9883, 19689, 39455, 78751 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`a[ 2n-1 ] = 2 a[ 2n-2 ] - a[ n ] for n >= 2; a[ 2n ] = 2 a[ 2n-1 ] + a[ n ] for n >= 2`
	CROSSREFS	`Adjacent sequences: A045688 A045689 A045690 this_sequence A045692 A045693 A045694` `Sequence in context: A089098 A129384 A131887 this_sequence A045961 A117272 A118744`
	KEYWORD	`nonn`
	AUTHOR	`TORSTEN.SILLKE(AT)LHSYSTEMS.COM`

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.