A301847 Number of 7Xn 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

64, 8192, 132971, 3518619, 77396422, 1812097252, 41966406867, 972282892539, 22595595313115, 524762543383531, 12194289128927894, 283431884166143510, 6588576515306179215, 153173958754721101279, 3561231247509661888958

Offset: 1

Author

R. H. Hardin, Mar 27 2018

Keywords

• nonn

Comments

Row 7 of A301841.

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
..1..1..1..0..0. .1..1..1..0..0. .1..1..1..0..0. .1..1..1..0..0
..0..0..1..0..0. .0..0..1..0..0. .0..0..1..1..0. .0..0..1..1..0
..0..0..1..1..0. .0..0..1..1..0. .0..0..1..0..0. .0..0..0..0..1
..0..0..0..1..1. .0..0..0..1..0. .1..0..1..1..1. .1..1..1..0..0
..1..1..0..0..0. .1..0..1..0..1. .0..0..0..0..1. .0..0..1..1..0
..1..0..1..1..0. .0..1..1..1..0. .1..1..0..0..1. .0..0..1..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Crossrefs

Cf. A301841.