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A237205
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Number of (n+1)X(2+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal
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1
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1160, 8396, 59386, 472096, 3795060, 31758656, 268073808, 2299621682, 19798836956, 171720524760, 1490935517068, 12994101833060, 113246139505684, 989136025760348, 8636006648736322, 75505947589499378, 659829426416683152
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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 recurrence of order 97 (see link above)
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EXAMPLE
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Some solutions for n=3
..3..1..3....0..1..2....0..0..0....0..3..2....1..1..3....0..2..0....1..3..1
..1..2..1....2..3..0....2..1..3....1..3..3....3..0..1....2..0..2....2..0..2
..3..1..0....3..2..1....1..1..1....0..3..2....1..1..1....2..0..2....2..1..2
..2..1..1....2..3..0....1..1..3....3..1..3....0..2..3....0..2..0....2..3..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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