A316377 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 7, 83, 3909, 353009, 70282175, 33482107028, 36877502600422, 91111250554598003

Offset

1,2

Comments

Diagonal of A316383.

Links

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

Example

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

Crossrefs

Cf. A316383.

Sequence in context: A231259 A187649 A368853 * A053128 A027819 A269895

Adjacent sequences: A316374 A316375 A316376 * A316378 A316379 A316380

Keyword

nonn

Author

R. H. Hardin, Jun 30 2018

Status

approved