A206884 Number of n X n 0..1 arrays avoiding 0 1 0 horizontally and 1 0 0 vertically.

2, 16, 240, 7878, 607043, 111550389, 47015346159, 45805591252624, 104403459975101887, 559553426119779395361, 7050914050087672286282505, 208939006267581096192535752843, 14569335412372326231761169576376298

Offset: 1

Author

R. H. Hardin Feb 13 2012

Keywords

• nonn

Comments

Diagonal of A206889

Examples

			Some solutions for n=4
..0..0..1..1....1..0..1..1....0..0..1..1....0..1..1..1....1..0..0..0
..1..0..0..0....1..1..1..1....0..0..1..1....0..0..1..1....0..1..1..0
..0..1..1..1....0..1..1..1....1..1..0..0....1..1..1..0....1..0..1..1
..1..0..1..1....1..1..0..0....1..1..1..1....0..1..1..1....1..1..1..1