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A252064
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Number of (n+2)X(7+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 4
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1
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10836, 43618, 299027, 2292363, 18508976, 151165482, 1229012088, 9989905340, 81383095801, 663247905243, 5404259846759, 44037554191519, 358893036197953, 2925065465729381, 23840188492575250, 194301900497527943
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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=2
..2..1..2..2..2..2..1..2..2....2..2..2..2..2..2..2..2..2
..1..2..2..1..2..2..1..2..2....1..2..2..2..2..2..2..2..1
..2..2..2..2..2..2..1..2..2....2..2..2..2..1..2..2..2..2
..2..2..2..2..2..2..1..2..2....2..2..2..2..2..2..2..2..2
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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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