A282855 - OEIS

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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

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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