A303248 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 3, 49, 1401, 106803, 19457754, 7600681910, 7516309079483, 16637614325062889

Offset: 1

Author

R. H. Hardin, Apr 20 2018

Keywords

• nonn

Comments

Diagonal of A303254.

Examples

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

Crossrefs

Cf. A303254.