A188879 Number of 7Xn binary arrays without the pattern 0 0 0 antidiagonally or horizontally.

128, 16384, 537496, 33617513, 2035428944, 109002398784, 6231989402196, 353870576831949, 19905175576044841, 1126107155232462372, 63649373276613825016, 3595294680877439593742, 203177355059869569596960

Offset

1,1

Comments

Row 7 of A188874

Links

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

Example

Some solutions for 7X3
..0..0..1....0..0..1....0..0..1....0..0..1....0..0..1....0..0..1....0..0..1
..0..1..0....1..1..1....1..0..1....0..0..1....1..0..0....1..0..0....0..0..1
..1..1..0....0..0..1....1..0..0....1..1..1....1..1..0....1..1..1....1..0..0
..0..1..0....1..0..1....0..1..0....0..0..1....1..0..1....0..1..1....0..1..1
..1..1..0....0..0..1....0..1..0....1..1..1....1..0..1....1..1..1....0..0..1
..1..0..0....1..1..1....0..1..0....1..1..1....1..1..1....1..1..1....0..0..1
..1..1..1....1..1..1....0..0..1....1..0..1....0..0..1....1..1..1....0..1..0

Crossrefs

Sequence in context: A223685 A189069 A189194 * A189115 A188908 A189109

Adjacent sequences: A188876 A188877 A188878 * A188880 A188881 A188882

Keyword

nonn

Author

R. H. Hardin, Apr 12 2011

Status

approved