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A237326
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Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
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1
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320, 1660, 8588, 45996, 242644, 1279474, 6740992, 36117846, 190631336, 1005363146, 5297587660, 28385155912, 149821450268, 790147365438, 4163579409000, 22309054217762, 117750984236192, 621010645500502
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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) = 886*a(n-4) -81785*a(n-8) +2512316*a(n-12) -31242554*a(n-16) +155011102*a(n-20) -288082700*a(n-24) +141692576*a(n-28) +6787392*a(n-32) for n>34
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EXAMPLE
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Some solutions for n=4
..1..2..2....2..1..2....1..0..1....2..0..2....0..1..1....2..2..2....1..1..2
..2..1..2....1..2..2....1..0..2....2..2..1....2..1..2....1..2..2....1..1..1
..0..0..1....2..0..2....2..0..0....0..1..0....1..1..2....2..1..2....1..0..2
..0..2..0....0..2..1....1..1..2....2..1..1....0..0..0....2..2..1....2..1..2
..1..0..2....0..1..2....1..2..1....0..2..2....1..2..2....2..2..2....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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