A316619 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 99, 120, 287, 1446, 5428, 20777, 86855, 376999, 1555947, 6605299, 28340559, 120010547, 511224042, 2182626138, 9302757001, 39650537419, 169186947163, 721643828709, 3077762454386, 13129828013176, 56010682628664

Offset

1,2

Comments

Column 7 of A316620.

Links

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

Example

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

Crossrefs

Cf. A316620.

Sequence in context: A133650 A045298 A304951 * A354500 A039446 A165603

Adjacent sequences: A316616 A316617 A316618 * A316620 A316621 A316622

Keyword

nonn

Author

R. H. Hardin, Jul 08 2018

Status

approved