A189152 Number of n X n binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally.

2, 16, 512, 37976, 8210464, 4708773306, 6787471566616, 25828698626846656, 247502169348575094540, 6064620415913633106142608

Offset: 1

Author

R. H. Hardin Apr 17 2011

Keywords

• nonn

Comments

Diagonal of A189161

Examples

			Some solutions for 4X4
..0..0..0..0....0..1..0..1....0..1..1..0....0..1..1..1....1..1..1..0
..0..0..0..0....1..0..0..1....1..1..0..0....0..1..0..1....1..1..0..0
..0..1..0..1....1..0..0..1....0..0..0..1....1..1..1..0....0..1..1..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..0..1..0