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A189258 Number of nX3 binary arrays without the pattern 0 0 1 diagonally, antidiagonally or horizontally 1
7, 49, 280, 1600, 8985, 50397, 282332, 1581428, 8857677, 49611209, 277868792, 1556321080, 8716833601, 48822302485, 273449899316, 1531571519964, 8578212427349, 48045897623297, 269101318957392, 1507215463960672 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A189264

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = 6*a(n-1) -2*a(n-2) +a(n-4) -50*a(n-5) -6*a(n-6) +140*a(n-7) -56*a(n-8)

EXAMPLE

Some solutions for 4X3

..1..1..1....0..1..0....1..1..0....0..1..1....1..1..1....0..1..0....1..1..0

..0..0..0....1..1..0....0..0..0....0..1..1....1..0..1....0..1..0....1..1..1

..0..0..0....1..1..1....0..1..1....0..1..1....0..0..0....1..1..1....0..1..1

..0..1..0....0..1..0....1..0..0....1..1..1....1..0..0....1..1..1....1..0..1

CROSSREFS

Sequence in context: A224131 A218266 A213295 * A188748 A188986 A146884

Adjacent sequences:  A189255 A189256 A189257 * A189259 A189260 A189261

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 19 2011

STATUS

approved

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Last modified February 22 05:58 EST 2018. Contains 299430 sequences. (Running on oeis4.)