A295212 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1s.

1, 69, 1162, 27208, 775547, 18444470, 444447937, 10896495280, 265837272259, 6495847859424, 158822121967384, 3880909066698091, 94831337129003187, 2317336322758510242, 56626572178295328836, 1383738694001835856870

Offset: 1

Author

R. H. Hardin, Nov 17 2017

Keywords

• nonn

Comments

Column 7 of A295213.

Examples

			Some solutions for n=4
..0..1..1..1..1..0..0. .1..1..1..0..0..0..0. .1..1..0..0..1..1..1
..1..1..1..0..1..0..0. .1..0..1..1..1..1..0. .1..1..0..1..1..0..1
..1..0..1..0..1..1..1. .1..1..1..0..0..1..1. .0..1..1..1..1..0..1
..1..1..1..0..0..1..1. .0..1..1..0..0..1..1. .0..1..1..0..1..1..1
		

Links

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

Crossrefs

Cf. A295213.