A283382 Number of nX4 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements.

0, 19, 532, 8087, 116624, 1592250, 20788531, 264040297, 3282238215, 40118887549, 483764807520, 5768246109027, 68131353675622, 798246637065836, 9287150583313283, 107389081231009891, 1235032262230121990

Offset

1,2

Comments

Column 4 of A283386.

Links

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

R. H. Hardin, Empirical recurrence of order 57

Formula

Empirical recurrence of order 57 (see link above)

Example

Some solutions for n=4
..0..0..1..1. .1..0..1..1. .0..0..1..0. .0..1..1..1. .1..1..0..1
..0..1..0..1. .1..0..1..0. .1..1..1..1. .0..1..0..0. .0..0..0..1
..1..0..1..1. .1..1..0..1. .0..1..0..0. .1..0..1..1. .1..1..1..0
..1..0..0..1. .0..1..0..0. .0..0..0..0. .1..1..0..0. .0..1..0..1

Crossrefs

Cf. A283386.

Sequence in context: A158583 A009081 A057644 * A196512 A027406 A053116

Adjacent sequences: A283379 A283380 A283381 * A283383 A283384 A283385

Keyword

nonn

Author

R. H. Hardin, Mar 06 2017

Status

approved