A303409 Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 98, 730, 6322, 160247, 1716995, 24386918, 497878411, 6748940959, 106242067376, 1858501096856, 28169515094303, 452053058478307, 7483434704337764, 118104298097496073, 1903568189475537422, 30951192368001440803

Offset: 1

Author

R. H. Hardin, Apr 23 2018

Keywords

• nonn

Comments

Column 7 of A303410.

Examples

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

Links

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

Crossrefs

Cf. A303410.