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A236877
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Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2X2 subblock equal
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1
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81, 211, 537, 1523, 4309, 12723, 37701, 113771, 344885, 1055235, 3241909, 10016411, 31053157, 96649875, 301652453, 944231531, 2962345045, 9314825443, 29344133653, 92608555963, 292718067013, 926588796211, 2936874197061, 9319996691467
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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) = 7*a(n-1) +8*a(n-2) -146*a(n-3) +101*a(n-4) +1205*a(n-5) -1580*a(n-6) -5058*a(n-7) +8248*a(n-8) +11528*a(n-9) -21176*a(n-10) -13840*a(n-11) +27808*a(n-12) +7360*a(n-13) -16768*a(n-14) -768*a(n-15) +3072*a(n-16)
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EXAMPLE
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Some solutions for n=5
..1..1....0..2....1..0....1..2....1..1....2..1....0..2....1..1....1..2....0..2
..2..0....1..2....2..0....1..1....2..1....1..1....2..1....1..0....1..2....2..0
..0..2....2..1....0..1....2..1....0..1....0..2....1..2....1..1....0..2....2..0
..0..2....1..2....0..2....0..1....2..1....1..1....2..0....0..1....1..2....1..1
..1..1....2..1....0..1....2..1....0..1....1..2....1..2....1..1....2..0....2..0
..2..0....1..2....2..0....1..1....1..2....1..0....2..0....1..0....2..1....2..0
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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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