A316203 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 78, 1253, 36585, 1962143, 189577494, 33224254530, 10584753639371

Offset

1,2

Comments

Diagonal of A316209.

Links

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

Example

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

Crossrefs

Cf. A316209.

Sequence in context: A052698 A052603 A071556 * A303507 A145508 A266090

Adjacent sequences: A316200 A316201 A316202 * A316204 A316205 A316206

Keyword

nonn

Author

R. H. Hardin, Jun 26 2018

Status

approved