A283790 Number of 7 X n 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.

0, 1376, 496884, 33933330, 2592339953, 179632502674, 11308125156356, 691219155559695, 40828203365976035, 2344506979220822688, 131993523055559927641, 7303922349003462564655, 398351268066107116966679

Offset

1,2

Comments

Row 7 of A283784.

Links

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

Example

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

Crossrefs

Cf. A283784.

Sequence in context: A122692 A076760 A283231 * A345515 A345768 A323815

Adjacent sequences: A283787 A283788 A283789 * A283791 A283792 A283793

Keyword

nonn

Author

R. H. Hardin, Mar 16 2017

Status

approved