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

1,1

Comments

Diagonal of A183322

Links

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

Example

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

Crossrefs

Sequence in context: A091241 A198076 A330675 * A066863 A296828 A135815

Adjacent sequences: A183310 A183311 A183312 * A183314 A183315 A183316

Keyword

nonn

Author

R. H. Hardin Jan 03 2011

Status

approved