A300366 Number of n X n 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 1, 0, 3, 32, 366, 12042, 729062, 70536528, 13229207915, 4795249162868

Offset: 1

Author

R. H. Hardin, Mar 04 2018

Keywords

• nonn

Comments

Diagonal of A300372.

Examples

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

Crossrefs

Cf. A300372.