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A237569
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Number of (n+1)X(1+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
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1
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256, 1876, 13924, 103264, 769680, 5705156, 42501300, 315065200, 2347267424, 17400203636, 129631996580, 960959725312, 7159191300272, 53070925060004, 395380448791316, 2930946979641872, 21835672557183872, 161867373265982548
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OFFSET
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1,1
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COMMENTS
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Column 1 of A237574
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 23*a(n-2) +1473*a(n-4) +15833*a(n-6) +60176*a(n-8) +65344*a(n-10) -70656*a(n-12) -139264*a(n-14) for n>15
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EXAMPLE
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Some solutions for n=4
..2..3....1..1....2..1....1..1....3..2....2..2....2..2....3..2....3..3....0..2
..1..1....1..3....3..2....0..3....1..1....2..2....1..1....1..1....0..1....2..1
..3..3....1..2....1..1....3..2....3..0....1..1....1..3....1..0....1..0....3..2
..2..0....0..1....1..0....2..0....1..0....3..1....0..0....0..3....0..0....0..1
..2..2....3..0....2..3....1..0....3..3....3..2....3..0....3..3....1..3....0..0
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CROSSREFS
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Sequence in context: A237158 A237151 A237574 * A237544 A206752 A237539
Adjacent sequences: A237566 A237567 A237568 * A237570 A237571 A237572
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 09 2014
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STATUS
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approved
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