A284328 Number of n X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

1, 4, 49, 5130, 1792007, 3063494246, 20513380740103, 582475612060753356

Offset: 1

Author

R. H. Hardin, Mar 25 2017

Keywords

• nonn

Comments

Diagonal of A284334.

Examples

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

Crossrefs

Cf. A284334.