A282855 Number of n X n 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors.

2, 11, 131, 4163, 305430, 55930891, 25000646212, 27295999984619, 72988931277612942, 477182559947251724928, 7632223466274455982169083, 298610649015649904265150954293, 28578493893088208888472545213927279

Offset

1,1

Comments

Diagonal of A282862.

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Cf. A282862.

Sequence in context: A337458 A066382 A276030 * A139387 A041725 A330638

Adjacent sequences: A282852 A282853 A282854 * A282856 A282857 A282858

Keyword

nonn

Author

R. H. Hardin, Feb 23 2017

Status

approved