A183313 Number of n X n 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.

2, 6, 43, 480, 11385, 455509, 35629548, 4963103592, 1301324910599, 621440459491278, 550719742223029437, 895987628972185952650, 2692063790042095644897446, 14888067283069842424203964441

Offset: 1

Author

R. H. Hardin Jan 03 2011

Keywords

• nonn

Comments

Diagonal of A183322

Examples

			Some solutions for 6X6
..0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..0..0..0....0..0..0..0..0..0
..0..1..1..0..0..0....0..0..0..1..1..0....1..1..0..0..0..0....0..0..0..0..0..0
..0..1..1..1..1..1....1..1..0..1..1..0....0..0..0..0..0..1....0..0..0..1..1..0
..1..1..0..1..1..1....1..1..1..1..0..1....1..1..0..0..0..1....0..1..1..1..1..1
..1..1..1..1..1..1....1..1..1..1..1..1....1..1..0..0..0..1....1..1..1..1..1..1
..0..1..1..1..1..1....1..1..0..1..1..0....1..1..1..1..1..1....1..1..0..1..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..17