A297601 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 3 neighboring 1's.

2, 11, 181, 6413, 654033, 167209522, 113592447685, 194907376248498, 879332745226144714, 10237211550601397234033

Offset

1,1

Comments

Diagonal of A297607.

Links

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

Example

Some solutions for n=4
..1..0..0..0. .1..0..0..0. .0..1..0..0. .0..1..0..1. .1..0..0..0
..0..0..0..1. .0..1..0..0. .0..0..0..0. .0..1..0..0. .1..0..0..0
..0..0..0..1. .0..1..0..0. .0..0..0..1. .1..1..0..0. .1..0..0..0
..0..1..0..1. .0..0..1..0. .0..1..0..1. .0..1..0..1. .0..0..1..0

Crossrefs

Cf. A297607.

Sequence in context: A271507 A217391 A385775 * A089760 A288556 A353930

Adjacent sequences: A297598 A297599 A297600 * A297602 A297603 A297604

Keyword

nonn

Author

R. H. Hardin, Jan 01 2018

Status

approved