A303618 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 2, 38, 325, 37910, 6446485, 6323564388, 18955122420980, 214926958781186214

Offset: 1

Author

R. H. Hardin, Apr 27 2018

Keywords

• nonn

Comments

Diagonal of A303624.

Examples

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

Crossrefs

Cf. A303624.