A301394 Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 1, 3, 78, 4857, 885003, 528025038, 956047339302, 5338842851150762, 91544753173766016191, 4821728266187979354515714

Offset: 1

Author

R. H. Hardin, Mar 20 2018

Keywords

• nonn

Comments

Diagonal of A301400.

Examples

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

Crossrefs

Cf. A301400.