A297936 Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

1, 5, 4, 33, 330, 3977, 76374, 2200020, 90659562, 5508084254

Offset

1,2

Comments

Diagonal of A297943.

Links

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

Example

Some solutions for n=7
..0..1..1..1..1..0..0. .0..0..0..1..0..0..0. .0..0..1..1..1..1..0
..1..1..0..0..1..0..1. .0..1..1..0..1..0..1. .0..1..0..0..0..1..1
..1..0..1..0..0..0..0. .1..0..1..0..1..1..1. .0..1..1..0..1..1..0
..1..0..0..1..0..1..0. .1..0..1..0..1..0..0. .0..0..0..1..0..0..0
..1..0..1..0..0..1..1. .0..1..1..0..1..0..0. .0..1..0..1..0..1..0
..1..1..0..1..0..1..0. .1..0..1..0..1..1..1. .0..1..1..0..1..1..0
..0..1..1..0..1..1..1. .1..1..0..0..1..0..1. .0..0..0..0..0..0..0

Crossrefs

Cf. A297943.

Sequence in context: A157101 A237648 A091001 * A298548 A078811 A093399

Adjacent sequences: A297933 A297934 A297935 * A297937 A297938 A297939

Keyword

nonn

Author

R. H. Hardin, Jan 09 2018

Status

approved