A189157 Number of n X 5 binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally.

28, 784, 21952, 424401, 8210464, 151889331, 2710884810, 48083827685, 844714479714, 14772128520081, 257802672361640, 4491710608316816, 78198928468727304, 1360792591701114315, 23673324742422186018

Offset

1,1

Comments

Column 5 of A189161.

Links

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

Example

Some solutions for 4 X 5
..0..1..0..1..0....0..0..1..0..1....0..1..0..0..1....0..0..0..0..1
..0..0..1..0..0....1..0..1..0..1....1..1..1..1..1....1..1..1..0..0
..0..1..0..0..1....0..0..1..0..1....0..1..1..0..1....0..1..0..1..1
..1..1..1..0..0....0..1..0..0..0....0..1..1..0..0....1..1..0..0..1

Crossrefs

Cf. A189161.

Sequence in context: A189907 A189339 A189775 * A267732 A009972 A114037

Adjacent sequences: A189154 A189155 A189156 * A189158 A189159 A189160

Keyword

nonn

Author

R. H. Hardin, Apr 17 2011

Status

approved