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A207474
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Number of nX3 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal
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1
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58, 3364, 133556, 5632964, 236422326, 9918542118, 415949940602, 17445552068794, 731700177749008, 30688945043507104, 1287152210679243960, 53985590138076197056, 2264257474181354143802, 94967231394228308838804
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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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EXAMPLE
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Some solutions for n=4
..1..1..0....0..2..0....1..3..2....0..0..3....0..0..3....3..1..1....0..3..3
..3..2..0....3..0..0....2..0..2....0..1..1....2..3..1....1..3..2....0..1..3
..3..0..0....2..1..1....2..1..3....2..1..3....1..2..0....3..0..2....2..1..1
..2..1..3....0..2..1....0..1..1....2..1..1....1..0..0....1..1..2....2..1..1
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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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