id:A045697 - OEIS Search Results

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Number of ternary words of length n (beginning 0) with autocorrelation function 2^(n-1)+3.

+0
1

0, 0, 1, 0, 2, 8, 24, 70, 214, 638, 1930, 5782, 17394, 52160, 156620 (list; graph; listen)

	OFFSET	`1,5`
	FORMULA	`a[ 2n ] = 3 a[ 2n-1 ] + 2 a[ n ] - a[ n+1 ] for n >= 3; a[ 2n-1 ] = 3 a[ 2n-2 ] + 2 a[ n ] for n >= 3`
	CROSSREFS	`Sequence in context: A097064 A018045 A050242 this_sequence A131569 A066973 A130495` `Adjacent sequences: A045694 A045695 A045696 this_sequence A045698 A045699 A045700`
	KEYWORD	`nonn`
	AUTHOR	`TORSTEN.SILLKE(AT)LHSYSTEMS.COM`

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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.