A189909 Number of 7Xn binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally

96, 9216, 884736, 36890502, 1518596226, 63149685928, 2662054379066, 111638761715758, 4622530935507966, 190665313953931062, 7834025420282521194, 321059587185451853573

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