A316276 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 7, 125, 9540, 1820908, 1000914270, 1545539179382, 6744089252983902, 83045349878880145528

Offset

1,2

Comments

Diagonal of A316282.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A316282.

Sequence in context: A360337 A304420 A217910 * A220615 A113162 A180583

Adjacent sequences: A316273 A316274 A316275 * A316277 A316278 A316279

Keyword

nonn

Author

R. H. Hardin, Jun 28 2018

Status

approved