A303894 Number of nX6 0..1 arrays with every element unequal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

5, 1145, 3420, 39711, 200144, 1541443, 9758243, 68015993, 462257363, 3129826391, 21703155196, 147148586804, 1017951482338, 6966704502733, 47967810896265, 330173281171357, 2270469305923316, 15652931333829738, 107730579365994677

Offset

1,1

Comments

Column 6 of A303896.

Links

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

Example

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

Crossrefs

Cf. A303896.

Sequence in context: A220790 A123266 A330391 * A305286 A304899 A316581

Adjacent sequences: A303891 A303892 A303893 * A303895 A303896 A303897

Keyword

nonn

Author

R. H. Hardin, May 02 2018

Status

approved