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

1,1

Comments

Row 7 of A269075.

Links

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

Example

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

Crossrefs

Cf. A269075.

Sequence in context: A327772 A306746 A332545 * A200789 A250356 A269587

Adjacent sequences: A269078 A269079 A269080 * A269082 A269083 A269084

Keyword

nonn

Author

R. H. Hardin, Feb 19 2016

Status

approved