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

0

`%I #6 Apr 26 2020 20:42:44
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`%S 2,15,287,18320,3455416,1974531630,3418770498783,17870966063289283,
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`%T 282553643923249045737,13505171096689643652228930,
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`%U 1951495960309987636340762968396
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`%N Number of n X n 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.
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`%C Diagonal of A283282.
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`%e Some solutions for n=4
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`%e ..1..1..0..0. .0..1..0..0. .0..1..0..1. .0..0..1..0. .1..0..1..1
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`%e ..0..0..1..0. .1..0..0..1. .0..1..0..0. .1..0..0..1. .1..0..0..1
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`%e ..0..0..0..1. .0..1..0..0. .0..1..0..1. .0..1..0..0. .0..1..0..1
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`%e ..0..0..1..0. .0..0..1..0. .0..0..1..0. .0..1..1..1. .0..0..1..0
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`%Y Cf. A283282.
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`%K nonn
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`%O 1,1
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`%A _R. H. Hardin_, Mar 04 2017
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