A283662 Number of nX4 0..1 arrays with no element unequal to more than four of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

0, 0, 403, 11886, 165152, 1712052, 15351085, 126810474, 989755263, 7421134282, 53972500634, 383258656118, 2669593728208, 18301919622500, 123810569805676, 828107771754630, 5484831030514008, 36019172324299540, 234771330638001725

Offset

1,3

Comments

Column 4 of A283666.

Links

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

R. H. Hardin, Empirical recurrence of order 84

Formula

Empirical recurrence of order 84 (see link above)

Example

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

Crossrefs

Cf. A283666.

Sequence in context: A261857 A379125 A165808 * A097741 A117836 A185640

Adjacent sequences: A283659 A283660 A283661 * A283663 A283664 A283665

Keyword

nonn

Author

R. H. Hardin, Mar 13 2017

Status

approved