A189335 Number of n X n binary arrays without the pattern 1 0 0 1 diagonally, vertically, antidiagonally or horizontally.

2, 16, 512, 36626, 6814820, 2650369322, 2739456017053, 6190300153637745

Offset: 1

Author

R. H. Hardin Apr 20 2011

Keywords

• nonn

Comments

Diagonal of A189343

Examples

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