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A251828
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Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 3 or 6 and every diagonal and antidiagonal sum 3 or 6.
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1
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413202, 3073138, 38456182, 266585018, 4235688278, 56477451898, 395032012018, 6329242225706, 84607975731406, 594794453852114, 9561704850018734, 127959128017190450, 900849501297997482, 14485002806380503874
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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=1
..2..1..1..3..3..1..1..3..3....1..3..3..1..0..0..1..1..0
..1..1..0..0..0..0..0..0..2....0..0..0..1..3..3..3..3..2
..1..0..3..2..2..3..3..2..2....3..2..2..0..2..2..0..3..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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