A289644 Number of n X n 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 2, 61, 8554, 2662095, 5675111511, 35072966294346, 1096128160677176696, 121691314711314375091217

Offset: 1

Author

R. H. Hardin, Jul 09 2017

Keywords

• nonn

Comments

Diagonal of A289651.

Examples

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

Crossrefs

Cf. A289651.