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A045697 Number of ternary words of length n (beginning 0) with autocorrelation function 2^(n-1)+3. 0
0, 0, 1, 0, 2, 8, 24, 70, 214, 638, 1930, 5782, 17394, 52160, 156620 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..15.

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: A293006 A018045 A050242 * A131569 A290904 A231200

Adjacent sequences:  A045694 A045695 A045696 * A045698 A045699 A045700

KEYWORD

nonn

AUTHOR

TORSTEN.SILLKE(AT)LHSYSTEMS.COM

STATUS

approved

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Last modified May 26 02:35 EDT 2019. Contains 323579 sequences. (Running on oeis4.)