A283956 Number of 7Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.

0, 0, 597042, 68693470, 6816984648, 669777003928, 62944601744067, 5709831013093658, 508781396370757815, 44682472147852468812, 3874470768927233440485, 332663634061493461202020

Offset

1,3

Comments

Row 7 of A283950.

Links

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

Example

Some solutions for n=3
..0..0..0. .0..0..0. .0..1..0. .0..1..0. .0..1..0. .0..0..0. .0..0..0
..1..1..0. .0..0..0. .0..0..0. .1..1..0. .0..0..0. .0..1..0. .1..1..0
..1..0..0. .1..1..1. .1..0..0. .0..1..1. .1..1..1. .0..0..1. .1..0..1
..1..1..1. .0..0..0. .0..1..1. .1..0..0. .0..1..1. .1..1..1. .0..0..1
..0..0..1. .1..0..1. .1..0..1. .1..1..1. .1..0..0. .1..0..0. .1..1..1
..0..0..1. .1..1..1. .0..0..0. .0..1..0. .1..0..0. .1..1..1. .1..0..0
..0..0..1. .1..0..0. .0..0..1. .1..1..1. .0..1..0. .0..1..0. .0..0..1

Crossrefs

Cf. A283950.

Sequence in context: A236736 A205270 A187643 * A151435 A143910 A206598

Adjacent sequences: A283953 A283954 A283955 * A283957 A283958 A283959

Keyword

nonn

Author

R. H. Hardin, Mar 18 2017

Status

approved