A297743 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1's.

1, 5, 66, 852, 34159, 6379211, 2703029494, 2266768029479, 5448033721050367

Offset

1,2

Comments

Diagonal of A297749.

Links

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

Example

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

Crossrefs

Cf. A297749.

Sequence in context: A169934 A162443 A219678 * A279463 A361409 A367837

Adjacent sequences: A297740 A297741 A297742 * A297744 A297745 A297746

Keyword

nonn

Author

R. H. Hardin, Jan 05 2018

Status

approved