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A198716
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Number of n X n 0..6 arrays with values 0..6 introduced in row major order and no element equal to any horizontal or vertical neighbor
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2
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions with all values 0 to 6 for n=4
..0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1
..2..3..1..0....2..3..1..0....2..3..1..0....2..3..1..0....2..3..1..0
..4..5..2..4....4..0..5..2....0..1..4..3....4..1..0..5....4..2..0..5
..6..0..6..1....6..4..6..0....1..5..3..6....1..6..2..1....3..1..6..1
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MATHEMATICA
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A198723 = Cases[Import["https://oeis.org/A198723/b198723.txt", "Table"], {_, _}][[All, 2]];
a[n_] := A198723[[2 n^2 - 2 n + 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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