A283725 Number of nX7 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.

0, 4220, 369328, 25260000, 1590274565, 94357463834, 5410290101514, 302490564406270, 16600142770401845, 897968848303855396, 48020384269733267214, 2544060241155707255130, 133737173204786854881261

Offset

1,2

Comments

Column 7 of A283726.

Links

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

Example

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

Crossrefs

Cf. A283726.

Sequence in context: A250947 A291136 A067140 * A109488 A245316 A046335

Adjacent sequences: A283722 A283723 A283724 * A283726 A283727 A283728

Keyword

nonn

Author

R. H. Hardin, Mar 15 2017

Status

approved