A183367 Number of nX5 binary arrays with no element equal to the sum mod 3 of its horizontal and vertical neighbors.

4, 21, 108, 548, 3102, 17101, 95674, 543837, 3094889, 17654882, 100922299, 576885277, 3298560872, 18868606128, 107935859047, 617459322870, 3532519181939, 20210076149240, 115625671366613, 661524633792529

Offset: 1

Author

R. H. Hardin Jan 04 2011

Keywords

• nonn

Comments

Column 5 of A183368

Examples

			Some solutions for 7X5
..0..1..1..0..1....0..1..0..1..1....1..1..1..1..0....0..1..0..1..1
..1..1..1..0..0....0..0..0..1..1....1..0..0..1..0....1..0..0..1..1
..1..0..1..0..1....1..0..0..0..0....1..0..0..1..1....0..0..0..1..0
..1..1..1..0..0....0..0..1..1..0....1..1..1..0..1....0..1..1..1..0
..0..0..0..0..0....0..1..1..1..0....0..0..1..1..1....1..1..0..0..1
..0..0..1..1..1....1..1..0..1..1....1..0..0..0..0....1..1..0..0..0
..1..0..1..1..1....1..1..1..1..1....0..0..1..0..1....1..1..0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200