A305455 Number of nX6 0..1 arrays with every element unequal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 209, 1891, 48148, 1117343, 25891309, 612656116, 14339915102, 337239061289, 7920819385086, 186084400183300, 4371833121122134, 102706718977110820, 2412930568949026303, 56687408908124252893, 1331772655188493216188

Offset

1,2

Comments

Column 6 of A305457.

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..1..0..1..0. .0..1..1..0..1..0. .0..1..1..1..0..1
..0..1..1..0..0..1. .0..1..1..0..0..1. .0..1..0..0..1..1. .0..1..0..0..0..1
..0..0..1..1..0..1. .0..0..1..0..1..0. .0..1..1..0..0..1. .0..0..1..0..0..0
..1..0..0..1..0..0. .0..1..0..1..1..1. .0..1..1..0..0..0. .0..1..1..0..0..1
..1..0..1..0..1..1. .0..1..1..0..1..0. .1..0..1..1..0..1. .1..0..1..0..0..1

Crossrefs

Cf. A305457.

Sequence in context: A104874 A157441 A304063 * A305020 A316684 A235731

Adjacent sequences: A305452 A305453 A305454 * A305456 A305457 A305458

Keyword

nonn

Author

R. H. Hardin, Jun 01 2018

Status

approved