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A233685
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Number of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 10, and no two adjacent values equal
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1
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108, 548, 2628, 13324, 64756, 327588, 1596200, 8064200, 39342364, 198550888, 969646256, 4888808640, 23897490056, 120377986076, 588951127540, 2964164674456, 14514267629692, 72990785983124, 357684877930284
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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) = a(n-1) +28*a(n-2) -25*a(n-3) -103*a(n-4) +97*a(n-5) +68*a(n-6) -47*a(n-7) -12*a(n-8) +2*a(n-9)
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EXAMPLE
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Some solutions for n=5
..0..2..0....1..0..1....2..1..0....2..0..1....0..1..2....0..1..3....2..0..2
..2..1..2....0..2..3....1..3..2....0..1..3....1..3..1....2..3..2....3..2..3
..0..2..0....1..0..1....0..1..3....2..0..2....0..2..0....0..2..0....2..0..1
..2..3..1....3..2..0....2..0..2....3..1..0....2..3..1....1..3..2....1..2..0
..0..1..2....2..0..1....3..2..1....2..0..2....3..1..0....2..1..3....2..0..1
..2..3..1....3..2..0....2..0..2....0..1..3....2..3..1....0..2..1....3..2..3
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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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