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A237101
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Number of (n+1)X(1+1) 0..2 arrays with the maximum minus the upper median of every 2X2 subblock equal
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1
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81, 385, 1881, 9491, 48569, 252415, 1324297, 7013479, 37376009, 200312023, 1077728201, 5817662711, 31477339337, 170637062839, 926272600521, 5033545168183, 27374673893833, 148966846198839, 811006553994697
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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) = 9*a(n-1) -166*a(n-3) +224*a(n-4) +820*a(n-5) -1088*a(n-6) -1608*a(n-7) +1712*a(n-8) +1280*a(n-9) -832*a(n-10) -320*a(n-11)
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EXAMPLE
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Some solutions for n=5
..1..0....1..2....1..1....0..2....0..1....1..1....0..0....1..2....1..2....1..2
..2..2....0..1....2..2....0..1....1..0....0..1....0..1....0..2....1..2....2..1
..2..2....0..0....0..1....2..1....1..0....2..2....2..0....2..0....2..2....0..2
..1..0....1..2....1..0....0..1....0..1....2..2....1..1....2..2....0..0....0..2
..2..2....1..0....1..0....2..1....1..1....1..1....1..2....0..0....2..2....2..1
..0..1....2..1....1..0....0..1....1..1....0..0....0..0....0..0....1..1....0..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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