A304702 Number of nX6 0..1 arrays with every element unequal to 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

5, 165, 103, 798, 5232, 47440, 296646, 2733069, 26024851, 201787639, 1816538401, 16564524559, 138289503554, 1229262208629, 10936054664014, 93981425527645, 829519231541114, 7309156980531674, 63553491773708500, 558911166353330443

Offset

1,1

Comments

Column 6 of A304704.

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

Crossrefs

Cf. A304704.

Sequence in context: A247468 A304056 A305450 * A316453 A305013 A316646

Adjacent sequences: A304699 A304700 A304701 * A304703 A304704 A304705

Keyword

nonn

Author

R. H. Hardin, May 17 2018

Status

approved