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A234413
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Number of (n+1)X(n+1) 0..7 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1
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0
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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=2
..3..4..3....3..2..3....1..0..0....5..5..5....6..7..7....2..2..2....6..6..6
..3..3..3....3..2..3....0..0..0....6..6..5....7..6..6....2..2..1....5..5..6
..2..3..3....2..3..3....0..1..0....5..6..5....7..7..6....1..2..2....6..6..5
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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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