A318069 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 6, 18, 73, 316, 3029, 46884, 935951, 38183961, 2877277695, 323244675173, 63938089963412, 22744080515948233, 13243562482553493420

Offset: 1

Author

R. H. Hardin, Aug 15 2018

Keywords

• nonn

Comments

Diagonal of A318075.

Examples

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

Crossrefs

Cf. A318075.