A305287 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero.

8, 4184, 13289, 246893, 1847322, 21092843, 214220078, 2256259549, 24509450800, 259901782836, 2843507124392, 30631168228754, 334342089367106, 3634031836968663, 39621260318244162, 432105418816370549

Offset

1,1

Comments

Column 7 of A305288.

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

Crossrefs

Cf. A305288.

Sequence in context: A159368 A167065 A303895 * A304900 A316582 A304596

Adjacent sequences: A305284 A305285 A305286 * A305288 A305289 A305290

Keyword

nonn

Author

R. H. Hardin, May 29 2018

Status

approved