A316647 Number of nX7 0..1 arrays with every element unequal to 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

8, 306, 599, 2432, 54941, 228056, 1396674, 17049299, 106043303, 774609628, 7324990570, 55119909036, 436298131908, 3797205688357, 30881995446060, 254258778361845, 2167620254285320, 18164281808012240, 152495270043730786

Offset

1,1

Comments

Column 7 of A316648.

Links

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

Example

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

Crossrefs

Cf. A316648.

Sequence in context: A304703 A316454 A305014 * A316175 A317457 A352591

Adjacent sequences: A316644 A316645 A316646 * A316648 A316649 A316650

Keyword

nonn

Author

R. H. Hardin, Jul 09 2018

Status

approved