A302217 Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 21, 1065, 172, 6423, 8756, 55922, 465040, 1136003, 19265064, 60547641, 699553699, 3796928584, 26139308319, 214325335931, 1151196050162, 10992872734396, 60033419186727, 538343914163895, 3376563558675197

Offset: 1

Author

R. H. Hardin, Apr 03 2018

Keywords

• nonn

Comments

Row 7 of A302212.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..111

Crossrefs

Cf. A302212.