A317214 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 908, 14652, 705763, 31138620, 1441577878, 66735041323, 3103003384185, 144406060742969, 6724517518065400, 313206471103491601, 14589794703117945367, 679654520942938242570, 31661882161040369005316

Offset

1,2

Comments

Column 7 of A317215.

Links

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

Example

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

Crossrefs

Cf. A317215.

Sequence in context: A304418 A316243 A305953 * A305684 A317064 A316931

Adjacent sequences: A317211 A317212 A317213 * A317215 A317216 A317217

Keyword

nonn

Author

R. H. Hardin, Jul 23 2018

Status

approved