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A283275
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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.
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0
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2, 15, 287, 18320, 3455416, 1974531630, 3418770498783, 17870966063289283, 282553643923249045737, 13505171096689643652228930, 1951495960309987636340762968396
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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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
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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