A318421 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 10, 8, 126, 280, 783, 2489, 9381, 35283, 124358, 433497, 1542555, 5562368, 20097597, 72352461, 259359679, 929755795, 3339985609, 12012273545, 43189126852, 155189811798, 557528400977, 2003243107506, 7199140751592

Offset

1,2

Comments

Column 6 of A318423.

Links

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

Example

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

Crossrefs

Cf. A318423.

Sequence in context: A213553 A317813 A038310 * A280902 A118768 A318255

Adjacent sequences: A318418 A318419 A318420 * A318422 A318423 A318424

Keyword

nonn

Author

R. H. Hardin, Aug 26 2018

Status

approved