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A236051
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Number of (n+1)X(4+1) 0..2 arrays colored with the difference of the maximum and minimum in each 2X2 subblock
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1
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3760, 11656, 32608, 92392, 258432, 741592, 2124772, 6124496, 17547052, 50132124, 143260344, 410835816, 1177174628, 3373853708, 9656442520, 27660783860, 79209492352, 226961257440, 649974851544, 1862015249488, 5332321730288
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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) = 4*a(n-2) +3*a(n-3) +24*a(n-4) +21*a(n-5) +28*a(n-6) -64*a(n-7) -199*a(n-8) -396*a(n-9) -578*a(n-10) -30*a(n-11) -136*a(n-12) -192*a(n-13) for n>16
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EXAMPLE
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Some solutions for n=4
..0..0..1..2..1....2..0..0..2..1....1..0..2..2..2....1..0..0..2..2
..0..1..2..1..0....1..0..1..2..1....1..1..1..2..2....2..1..0..1..2
..1..2..1..0..0....0..1..2..1..0....1..1..0..1..2....1..2..1..0..1
..1..1..0..1..2....1..2..1..0..1....2..2..1..1..0....0..1..2..1..0
..2..0..0..2..1....2..1..0..0..2....0..2..2..0..0....0..0..2..1..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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