A283697 Number of 7Xn 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors.

128, 10329, 285770, 14754038, 726353972, 31815868749, 1496646288297, 69850963263086, 3221369052765009, 149740885820566547, 6952281674548007260, 322402225772561502269, 14963967565321593288677, 694424158390671052514851

Offset

1,1

Comments

Row 7 of A283691.

Links

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

Example

Some solutions for n=2
..0..1. .1..0. .0..0. .1..1. .1..0. .1..0. .0..0. .0..0. .0..1. .1..0
..1..1. .1..0. .1..0. .0..1. .1..0. .1..0. .0..1. .1..1. .1..0. .1..1
..1..0. .0..1. .0..0. .1..1. .0..1. .0..0. .1..0. .0..0. .0..0. .0..0
..0..0. .0..0. .0..0. .0..0. .0..0. .1..1. .1..0. .0..0. .0..1. .0..0
..0..1. .0..0. .1..1. .0..0. .1..1. .1..0. .0..0. .1..0. .1..0. .0..1
..0..1. .0..0. .0..1. .0..1. .0..1. .1..0. .1..1. .0..0. .1..1. .0..1
..1..1. .0..0. .1..0. .1..0. .1..0. .0..1. .1..0. .1..1. .0..0. .0..1

Crossrefs

Cf. A283691.

Sequence in context: A181242 A035817 A297373 * A283129 A295715 A282398

Adjacent sequences: A283694 A283695 A283696 * A283698 A283699 A283700

Keyword

nonn

Author

R. H. Hardin, Mar 14 2017

Status

approved