A302673 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 1172, 10660, 106793, 2320879, 35549458, 637088915, 11181864782, 188509564214, 3339792969770, 57406756149300, 997632805281762, 17363763785624592, 300575131517843683, 5229363965628293685, 90736499929821199253

Offset: 1

Author

R. H. Hardin, Apr 11 2018

Keywords

• nonn

Comments

Row 7 of A302670.

Examples

			Some solutions for n=5
..0..0..0..1..0. .0..0..0..1..0. .0..0..0..0..0. .0..0..0..1..1
..1..0..1..0..1. .0..0..1..0..1. .0..0..1..1..0. .1..0..1..0..1
..1..1..1..0..0. .1..0..1..0..0. .1..1..1..1..0. .0..1..1..0..0
..1..1..1..0..1. .0..1..0..1..1. .0..0..0..0..1. .0..0..0..0..0
..1..0..1..1..1. .1..1..0..0..1. .1..1..1..1..0. .1..1..1..1..1
..0..0..1..0..1. .0..1..1..0..1. .1..0..0..1..1. .0..0..0..0..1
..1..1..1..1..0. .1..0..0..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. A302670.