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A230693
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Number of (n+2)X(4+2) 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least two elements with value (x(i,j)+1) mod 3, and upper left element zero
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1
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139, 2494, 442490, 50969202, 5571354016, 635625937026, 71568693539665, 8064304231273262, 909421551471875673, 102518796091518896672, 11557598996944627213330, 1302976030063695509658709
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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=3
..0..1..0..1..0..2....0..1..0..1..0..2....0..1..0..2..1..2....0..1..0..1..0..2
..2..1..2..2..0..1....2..1..2..2..0..1....2..1..2..2..0..0....2..1..2..2..1..0
..1..0..1..2..1..2....0..2..0..0..2..0....2..0..1..2..1..2....1..0..0..0..1..0
..0..2..0..0..0..0....1..0..1..2..1..1....1..0..1..0..1..1....2..1..0..0..2..0
..1..2..1..2..1..2....2..0..2..0..2..0....2..0..2..0..2..0....0..1..2..1..2..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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