A304549 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

1, 272, 749, 12281, 127607, 1368963, 16063367, 183955750, 2091952988, 24171750958, 277553198072, 3190136513649, 36716678813326, 422284655045291, 4857766186249146, 55888831842122530, 642944889250837908

Offset

1,2

Comments

Column 6 of A304551.

Links

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

Example

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

Crossrefs

Cf. A304551.

Sequence in context: A133514 A235293 A270302 * A316374 A306134 A317269

Adjacent sequences: A304546 A304547 A304548 * A304550 A304551 A304552

Keyword

nonn

Author

R. H. Hardin, May 14 2018

Status

approved