A298184 Number of n X n 0..1 arrays with every element equal to 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 1, 1, 3, 5, 10, 19, 41, 81, 196, 474, 1315, 3871, 15716, 68291, 339947, 1851904, 11717321, 86766476

Offset: 1

Author

R. H. Hardin, Jan 14 2018

Keywords

• nonn

Comments

Diagonal of A298187.

Examples

			Some solutions for n=7
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .1..1..1..1..1..1..1. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .1..1..1..1..1..1..1. .0..0..0..1..1..0..0
		

Crossrefs

Cf. A298187.