A283521 Number of nX7 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements.

0, 703, 241796, 34279720, 4331276717, 510843580504, 56913176714906, 6121670820777639, 641300961433598943, 65816441365940780452, 6645264195595547215366, 662013827914324498953906

Offset

1,2

Comments

Column 7 of A283522.

Links

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

Example

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

Crossrefs

Cf. A283522.

Sequence in context: A083735 A375918 A161021 * A334010 A257721 A253396

Adjacent sequences: A283518 A283519 A283520 * A283522 A283523 A283524

Keyword

nonn

Author

R. H. Hardin, Mar 09 2017

Status

approved