A316454 Number of nX7 0..1 arrays with every element unequal to 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

8, 306, 272, 3223, 29406, 349456, 4145337, 44700278, 711845805, 9122685519, 114303687154, 1698240252124, 22458444584840, 296936468898912, 4210496325368848, 56486583562161446, 761677516352617045

Offset

1,1

Comments

Column 7 of A316455.

Links

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

Example

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

Crossrefs

Cf. A316455.

Sequence in context: A304057 A305451 A304703 * A305014 A316647 A316175

Adjacent sequences: A316451 A316452 A316453 * A316455 A316456 A316457

Keyword

nonn

Author

R. H. Hardin, Jul 03 2018

Status

approved