A189900 Number of nX4 binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally

15, 225, 3375, 35656, 377517, 3810503, 36890502, 354894796, 3368920072, 31765314572, 298643477857, 2799075682549, 26196661596588, 244952250115880, 2288817676141909, 21378736239048787, 199638668209430098

Offset

1,1

Comments

Column 4 of A189905

Links

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

Example

Some solutions for 5X4
..0..0..0..0....0..1..0..0....0..0..0..1....0..0..0..1....0..1..0..0
..0..0..0..0....1..0..1..1....1..1..1..1....0..0..0..0....1..1..1..0
..0..0..0..0....0..1..0..0....1..1..0..1....0..0..0..1....0..1..1..0
..1..1..0..0....0..1..0..1....1..1..0..1....0..0..0..1....0..0..1..0
..0..0..0..0....1..1..0..1....0..1..0..1....1..1..0..1....1..0..1..0

Crossrefs

Sequence in context: A171289 A262336 A189906 * A189338 A189774 A189156

Adjacent sequences: A189897 A189898 A189899 * A189901 A189902 A189903

Keyword

nonn

Author

R. H. Hardin May 01 2011

Status

approved