A284764 Number of n X n 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.

0, 4, 119, 10120, 4219759, 7032604532, 48994677634459, 1392340919671593156

Offset: 1

Author

R. H. Hardin, Apr 02 2017

Keywords

• nonn

Comments

Diagonal of A284771.

Examples

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

Crossrefs

Cf. A284771.