A302361 Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 2, 31, 77, 6580, 330505, 188443738, 169314399506, 675015247638492

Offset: 1

Author

R. H. Hardin, Apr 06 2018

Keywords

• nonn

Comments

Diagonal of A302367.

Examples

			Some solutions for n=5
..0..1..1..0..0. .0..1..1..0..0. .0..0..0..0..0. .0..0..1..1..0
..1..1..0..0..1. .0..1..1..0..0. .1..0..1..0..0. .0..0..1..1..1
..0..1..0..0..0. .1..1..1..0..1. .0..0..1..0..1. .0..0..1..1..0
..1..1..1..0..1. .0..1..1..0..0. .0..0..1..0..0. .1..0..0..1..1
..1..1..1..0..1. .1..1..0..0..1. .1..0..0..0..0. .0..0..1..1..0
		

Crossrefs

Cf. A302367.