A299655 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

1, 8, 227, 22087, 7411398, 8607101770, 34546300829517, 478911551660693464, 22930235691929943217996

Offset: 1

Author

R. H. Hardin, Feb 15 2018

Keywords

• nonn

Comments

Diagonal of A299661.

Examples

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

Crossrefs

Cf. A299661.