A300678 Number of nX4 0..1 arrays with every element equal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 10, 11, 28, 80, 245, 729, 2604, 8579, 27943, 95535, 322511, 1083870, 3675083, 12455625, 42129388, 142706185, 483725646, 1638434358, 5551260311, 18812259092, 63741708473, 215983981369, 731885089125, 2480017406380, 8403581958869

Offset

1,2

Comments

Column 4 of A300682.

Links

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

R. H. Hardin, Empirical recurrence of order 82

Formula

Empirical recurrence of order 82 (see link above)

Example

Some solutions for n=5
..0..0..0..1. .0..1..1..0. .0..0..0..0. .0..0..1..1. .0..0..0..1
..0..1..0..0. .1..0..1..1. .0..1..1..0. .0..1..1..0. .0..1..0..0
..1..1..0..1. .1..1..0..1. .0..1..0..0. .0..0..0..0. .1..1..0..1
..1..0..1..1. .1..0..0..1. .0..0..1..1. .0..1..1..0. .0..1..0..0
..0..0..1..0. .1..1..1..1. .0..1..1..0. .1..1..0..0. .1..1..0..0

Crossrefs

Cf. A300682.

Sequence in context: A136833 A355631 A056067 * A086458 A179856 A098795

Adjacent sequences: A300675 A300676 A300677 * A300679 A300680 A300681

Keyword

nonn

Author

R. H. Hardin, Mar 11 2018

Status

approved