A297796 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 5 neighboring 1's.

1, 2, 37, 422, 23781, 5511367, 3420197908, 4611250894511, 18829563773811206

Offset

1,2

Comments

Diagonal of A297802.

Links

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

Example

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

Crossrefs

Cf. A297802.

Sequence in context: A243101 A001569 A092853 * A300542 A100849 A300969

Adjacent sequences: A297793 A297794 A297795 * A297797 A297798 A297799

Keyword

nonn

Author

R. H. Hardin, Jan 06 2018

Status

approved