A283275 - OEIS

A283275

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

2, 15, 287, 18320, 3455416, 1974531630, 3418770498783, 17870966063289283, 282553643923249045737, 13505171096689643652228930, 1951495960309987636340762968396

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OFFSET

1,1

COMMENTS

Diagonal of A283282.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=4

..1..1..0..0. .0..1..0..0. .0..1..0..1. .0..0..1..0. .1..0..1..1

..0..0..1..0. .1..0..0..1. .0..1..0..0. .1..0..0..1. .1..0..0..1

..0..0..0..1. .0..1..0..0. .0..1..0..1. .0..1..0..0. .0..1..0..1

..0..0..1..0. .0..0..1..0. .0..0..1..0. .0..1..1..1. .0..0..1..0

CROSSREFS

Cf. A283282.

Sequence in context: A377895 A371673 A087526 * A372312 A264703 A262961

Adjacent sequences: A283272 A283273 A283274 * A283276 A283277 A283278

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 04 2017

STATUS

approved