A207248 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.

2, 16, 102, 940, 9072, 101036, 1231650, 16436824, 237255370, 3684061372, 61152471648, 1079792961548, 20191392448058, 398344602963240, 8263930584283206, 179759826117751524, 4089350929606635216

Offset: 1

Author

R. H. Hardin Feb 16 2012

Keywords

• nonn

Comments

Diagonal of A207254

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..70