A283732 Number of 7Xn 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, 3668, 478164, 28103560, 1712274593, 99246546144, 5410290101514, 290532256300862, 15323786418541986, 795029724871568274, 40818159546168252400, 2076399050875132311982, 104791804975655773251687

Offset

1,2

Comments

Row 7 of A283726.

Links

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

Example

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

Crossrefs

Cf. A283726.

Sequence in context: A307937 A190923 A255088 * A283202 A365612 A205821

Adjacent sequences: A283729 A283730 A283731 * A283733 A283734 A283735

Keyword

nonn

Author

R. H. Hardin, Mar 15 2017

Status

approved