A316177 Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 134, 3653, 168051, 14569771, 2280994876, 658322110177, 351724619629025, 348538706870343133, 641870813261257824216

Offset

1,2

Comments

Diagonal of A316183.

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Cf. A316183.

Sequence in context: A281948 A128287 A221545 * A003375 A007032 A215553

Adjacent sequences: A316174 A316175 A316176 * A316178 A316179 A316180

Keyword

nonn

Author

R. H. Hardin, Jun 25 2018

Status

approved