A283520 Number of nX6 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements.

0, 145, 26662, 2032993, 136572268, 8593156813, 510843580504, 29325852758117, 1640229831666201, 89905007399752628, 4849467980640486825, 258162615558548188175, 13593142734850883923120, 709070366893625272065463

Offset

1,2

Comments

Column 6 of A283522.

Links

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

Example

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

Crossrefs

Cf. A283522.

Sequence in context: A031612 A226849 A097730 * A359013 A265439 A060720

Adjacent sequences: A283517 A283518 A283519 * A283521 A283522 A283523

Keyword

nonn

Author

R. H. Hardin, Mar 09 2017

Status

approved