A183320 Number of nX8 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it.

55, 523, 9767, 125103, 1872913, 25528515, 360327392, 4963103592, 68795107993, 947461430557, 13049865962515, 179449989707905, 2465460224449227, 33861928082629563, 464723391441659251, 6377980328407833025

Offset: 1

Author

R. H. Hardin Jan 03 2011

Keywords

• nonn

Comments

Column 8 of A183322

Examples

			Some solutions for 5X8
..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..0..0..0..0..1..1..1....0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0
..1..1..0..0..0..1..1..1....0..1..1..0..0..0..1..1....0..0..0..0..0..0..0..1
..1..1..1..1..1..1..0..1....0..1..1..0..0..1..1..0....0..0..0..1..1..0..1..1
..1..1..1..1..1..1..1..1....0..1..1..1..1..1..1..1....0..1..1..1..1..1..1..0
		

Links

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