A316305 Number of n X n 0..1 arrays with every element unequal to 0, 1, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 10, 74, 662, 4431, 96175, 3854852, 190235425, 21345024459

Offset

1,2

Comments

Diagonal of A316311.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A316311.

Sequence in context: A089745 A356820 A358491 * A317260 A111992 A325583

Adjacent sequences: A316302 A316303 A316304 * A316306 A316307 A316308

Keyword

nonn

Author

R. H. Hardin, Jun 29 2018

Status

approved