A296983 Number of n X n 0..1 arrays with each 1 adjacent to 3, 4 or 5 king-move neighboring 1's.

1, 2, 14, 74, 5487, 1621832, 702794334, 1529176981800, 12116399428974920

Offset

1,2

Comments

Diagonal of A296990.

Links

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

Example

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

Crossrefs

Cf. A296990.

Sequence in context: A192809 A198762 A119913 * A304049 A197874 A104871

Adjacent sequences: A296980 A296981 A296982 * A296984 A296985 A296986

Keyword

nonn

Author

R. H. Hardin, Dec 22 2017

Status

approved