A208835 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically.

2, 16, 78, 855, 8736, 272206, 6206445, 613538688, 30091441770, 9949962265465, 995860712362464, 1146808937112275178, 223896318271083352427, 927305041435819383020944, 341298409330345173624970966

Offset: 1

Author

R. H. Hardin Mar 01 2012

Keywords

• nonn

Comments

Diagonal of A208840

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..37