A284192 Number of n X n 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

1, 4, 43, 5268, 1488503, 3083244672, 18564422929880, 573011303756296687, 62959447148443427630088

Offset: 1

Author

R. H. Hardin, Mar 22 2017

Keywords

• nonn

Comments

Diagonal of A284199.

Examples

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

Crossrefs

Cf. A284199.