A045697 - OEIS

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A045697

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

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

	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: A036289 A018045 A050242 * A131569 A066973 A130495` `Adjacent sequences: A045694 A045695 A045696 * A045698 A045699 A045700`
	KEYWORD	`nonn`
	AUTHOR	`TORSTEN.SILLKE(AT)LHSYSTEMS.COM`

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Last modified February 16 23:45 EST 2012. Contains 205978 sequences.