A269081 Number of 7Xn binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

128, 1760, 43959, 742688, 14011359, 236272677, 4064720816, 67174864630, 1109043586715, 17995383255288, 290431722641261, 4645047826683577, 73887191299532384, 1168678595574438796, 18400291710723401503

Offset: 1

Author

R. H. Hardin, Feb 19 2016

Keywords

• nonn

Comments

Row 7 of A269075.

Examples

			Some solutions for n=3
..1..0..0. .0..0..0. .1..0..1. .1..0..1. .1..0..0. .1..0..1. .0..0..1
..1..0..0. .0..0..1. .1..0..1. .1..0..0. .0..0..1. .1..0..1. .0..0..1
..0..0..0. .1..0..0. .1..0..0. .1..0..0. .1..0..0. .0..0..0. .1..0..0
..1..0..0. .1..0..1. .1..0..0. .0..0..0. .0..0..0. .0..0..0. .1..0..0
..1..0..1. .1..0..1. .0..0..1. .0..0..0. .0..0..0. .0..0..1. .1..0..0
..0..0..1. .0..0..0. .0..0..1. .0..0..1. .1..0..1. .0..0..1. .1..0..1
..0..1..0. .1..0..0. .0..0..1. .1..0..1. .0..0..0. .0..0..1. .0..0..0
		

Links

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

Crossrefs

Cf. A269075.