A207176 Number of n X n 0..1 arrays avoiding 0 0 0 horizontally and 0 1 0 vertically.

2, 16, 241, 11227, 1507355, 567046841, 600838995529, 1782395103048207, 14875073639322545780, 349568074576274459361253, 23097327995486146831078764702, 4291548218733300058236161251915163

Offset: 1

Author

R. H. Hardin Feb 15 2012

Keywords

• nonn

Comments

Diagonal of A207182

Examples

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