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A233216
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Number of nX7 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order
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1
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2136, 63927526, 2085188355031, 68131170547319605, 2226181797646725541747, 72740398470430937674004869, 2376789549887845473135654118063, 77661501511303736156705770125000481
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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) = 33813*a(n-1) -37586312*a(n-2) +13154245126*a(n-3) -1823279915649*a(n-4) +121941114617057*a(n-5) -4330072079111646*a(n-6) +84481700679625284*a(n-7) -904847795173155960*a(n-8) +5048892735655335840*a(n-9) -12592032279830140032*a(n-10) +8367715579796052480*a(n-11)
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EXAMPLE
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Some solutions for n=2
..0..0..0..1..5..5..1....0..0..0..0..1..1..0....0..0..0..1..2..1..5
..0..0..0..2..1..3..4....0..0..1..2..5..4..2....0..0..1..1..5..5..4
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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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editing
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