A295114 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 4 1's.

1, 5, 26, 326, 8257, 420519, 43655680, 9196006628, 3931962260999, 3413278465996124, 6014918791165296861, 21516997694119562490452, 156257115416099427263269042, 2303561969444050408142747347914

Offset: 1

Author

R. H. Hardin, Nov 15 2017

Keywords

• nonn

Comments

Diagonal of A295120.

Examples

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

Crossrefs

Cf. A295120.