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A237635
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Number of (n+1)X(6+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
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1
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11936, 8594, 2900, 4440, 5656, 9368, 11984, 20756, 28336, 47134, 59920, 104172, 141680, 235572, 299600, 520860, 708400, 1177860, 1498000, 2604300, 3542000, 5889300, 7490000, 13021500, 17710000, 29446500, 37450000, 65107500, 88550000
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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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FORMULA
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Empirical: a(n) = 5*a(n-4) for n>14
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EXAMPLE
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Some solutions for n=5
..1..2..1..0..0..2..2....1..1..2..1..0..1..2....0..0..0..0..2..0..0
..0..0..2..1..0..1..2....1..2..0..0..0..2..1....0..2..1..0..1..2..1
..1..0..1..2..0..0..0....2..1..0..1..2..1..0....0..1..2..0..0..0..2
..2..0..0..0..2..1..0....0..0..0..2..0..0..0....0..0..0..2..1..0..1
..0..2..1..0..1..2..0....0..1..2..1..0..1..1....2..1..0..1..2..0..0
..0..1..2..0..0..0..2....1..2..0..0..0..2..2....0..2..0..0..1..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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