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A206859
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Number of nX4 0..2 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal
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1
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69, 4761, 192575, 7598355, 314918295, 13093461017, 541018725304, 22336434688428, 923097673638406, 38158725414249736, 1577142038208976046, 65180147142970134040, 2693823565225042593429, 111334863067931222656792
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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
..0..1..2..2....1..2..2..2....0..2..2..0....0..2..0..1....1..1..1..0
..2..2..0..0....1..2..2..2....1..0..0..0....2..0..1..1....1..2..2..2
..0..2..2..0....1..2..2..1....2..2..1..2....0..2..1..1....0..2..2..2
..0..1..1..1....1..2..2..1....0..1..2..2....2..0..0..1....2..0..0..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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