A283789 Number of 6Xn 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, 272, 62303, 2510456, 112397437, 4572654404, 169720104148, 6107937424212, 212446410870512, 7189140953293708, 238500703212988750, 7777861431597554114, 250042522164507124911, 7942472881684283792610, 249682369478871376219511

Offset

1,2

Comments

Row 6 of A283784.

Links

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

Example

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

Crossrefs

Cf. A283784.

Sequence in context: A283230 A280044 A162009 * A331655 A225833 A198289

Adjacent sequences: A283786 A283787 A283788 * A283790 A283791 A283792

Keyword

nonn

Author

R. H. Hardin, Mar 16 2017

Status

approved