A304696 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

8, 928, 9573, 124399, 1894297, 27769991, 389403912, 5581948043, 80739890302, 1161245568542, 16657035643006, 239529891739743, 3446569197031058, 49545001051376273, 712194629192265637, 10241055298106790590

Offset

1,1

Comments

Column 7 of A304697.

Links

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

Example

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

Crossrefs

Cf. A304697.

Sequence in context: A305366 A304958 A316640 * A316447 A316129 A317435

Adjacent sequences: A304693 A304694 A304695 * A304697 A304698 A304699

Keyword

nonn

Author

R. H. Hardin, May 17 2018

Status

approved