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A237535
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Number of (n+1)X(4+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock equal
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1
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83104, 4857060, 266120870, 15808900408, 924306101684, 55265390979178, 3305459406659964, 199510098055657088, 12080624520262702334, 735074852627156236784, 44859668256282656561688, 2745871351805467354744430
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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..2..1..0..1....3..2..0..1..3....3..2..1..3..3....1..1..1..0..0
..2..1..0..0..0....1..1..0..2..1....3..1..2..0..2....2..3..2..2..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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