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A207052
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Number of nX3 0..3 arrays avoiding the pattern z-1 z-1 z in any row or column
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1
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61, 3721, 197144, 10372376, 545111339, 28644905324, 1505319709390, 79106529010228, 4157126256306541, 218460955980561660, 11480325067745920617, 603301649054317613699, 31704056442805324248386, 1666077318047770545781882
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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..1....0..0..3....1..0..0....0..3..3....3..2..2....0..1..0....2..1..2
..3..3..0....2..3..1....0..0..3....0..1..3....0..2..3....3..2..2....3..0..1
..3..1..1....1..2..0....1..2..1....2..1..1....3..0..1....1..2..1....2..0..0
..3..2..1....1..0..0....0..1..3....2..1..1....2..3..2....1..0..2....1..3..0
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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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