A316640 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

8, 928, 4583, 44095, 532401, 5879970, 69857903, 835457349, 9913271027, 118531204693, 1418881976069, 16953784846473, 202779552350007, 2426142918934889, 29014644493523399, 347062113123737124

Offset

1,1

Comments

Column 7 of A316641.

Links

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

Example

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

Crossrefs

Cf. A316641.

Sequence in context: A304018 A305366 A304958 * A304696 A316447 A316129

Adjacent sequences: A316637 A316638 A316639 * A316641 A316642 A316643

Keyword

nonn

Author

R. H. Hardin, Jul 09 2018

Status

approved