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A189909 Number of 7Xn binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally 0
96, 9216, 884736, 36890502, 1518596226, 63149685928, 2662054379066, 111638761715758, 4622530935507966, 190665313953931062, 7834025420282521194, 321059587185451853573 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A189905

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for 7X4

..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

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

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

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

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

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

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

CROSSREFS

Sequence in context: A299856 A270603 A000545 * A189903 A189159 A254286

Adjacent sequences:  A189906 A189907 A189908 * A189910 A189911 A189912

KEYWORD

nonn

AUTHOR

R. H. Hardin May 01 2011

STATUS

approved

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Last modified October 18 23:35 EDT 2021. Contains 348071 sequences. (Running on oeis4.)