A316447 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

8, 928, 10696, 139705, 2520180, 39827783, 621643922, 10080547097, 161747868059, 2585482069092, 41479734342725, 665294366406575, 10663443448097662, 170965273126206457, 2741254377851667993, 43949488375165433197

Offset

1,1

Comments

Column 7 of A316448.

Links

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

Example

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

Crossrefs

Cf. A316448.

Sequence in context: A304958 A316640 A304696 * A316129 A317435 A241875

Adjacent sequences: A316444 A316445 A316446 * A316448 A316449 A316450

Keyword

nonn

Author

R. H. Hardin, Jul 03 2018

Status

approved