A283685 - OEIS

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A283685

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

2, 16, 264, 15226, 2530461, 1119189256, 1496646288297, 5725555721739395, 62058786307229208212, 1952915013418224842868823, 176329484983538571638638096503

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OFFSET

1,1

COMMENTS

Diagonal of A283691.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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