A297576 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1's.

1, 5, 36, 254, 5800, 395011, 38609160, 5752782514, 2136636243308, 1857722960742588, 2730521146982947356, 7180017772945965801201

Offset

1,2

Comments

Diagonal of A297582.

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Cf. A297582.

Sequence in context: A067376 A098305 A055270 * A164110 A285392 A327091

Adjacent sequences: A297573 A297574 A297575 * A297577 A297578 A297579

Keyword

nonn

Author

R. H. Hardin, Jan 01 2018

Status

approved