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A259734
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Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 or 01010101
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1
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20, 36, 190, 868, 4904, 36522, 416107, 4569918, 77901650, 1497446190, 42287505995, 1268416344438, 58326869184327, 2894771753919566, 215057618091485008, 17236097050206624440, 2090654209136652647325, 272722696022344377007246
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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
..0..1..0..0..0..1....0..0..1..0..1..0....0..1..0..1..0..0....1..0..1..0..1..0
..0..0..1..0..1..0....0..0..0..1..0..1....1..0..1..0..1..0....0..1..0..0..0..1
..0..1..0..1..0..1....1..0..1..0..1..0....0..0..0..1..0..1....0..0..1..0..1..0
..1..0..1..0..1..0....0..1..0..1..0..1....1..0..1..0..1..0....0..1..0..1..0..1
..0..1..0..1..0..1....0..0..1..0..0..0....0..1..0..1..0..0....1..0..1..0..1..0
..0..0..1..0..1..0....0..1..0..1..0..1....0..0..1..0..1..0....0..0..0..1..0..1
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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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