A304596 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

8, 4184, 54357, 1593375, 39628005, 957716506, 23762003978, 591616446858, 14572206851838, 360994251476480, 8936711526783355, 221039913402879007, 5470384324765026549, 135373164068450889148, 3349671504499320289459

Offset

1,1

Comments

Column 7 of A304597.

Links

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

Example

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

Crossrefs

Cf. A304597.

Sequence in context: A305287 A304900 A316582 * A316382 A306142 A317375

Adjacent sequences: A304593 A304594 A304595 * A304597 A304598 A304599

Keyword

nonn

Author

R. H. Hardin, May 15 2018

Status

approved