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A222746
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Number of nX7 0..3 arrays with exactly floor(nX7/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order
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1
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70, 1710608, 20825891902, 294955698998860, 3555678098386103283, 53383470246573011524686, 654193205170812775084974847, 10103355634312544389080282332563, 125051109525561104506969445492198468
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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..0..0..0..1..1..0....0..0..0..0..1..2..0....0..0..0..0..1..2..3
..0..0..0..2..0..1..3....0..0..0..2..3..1..3....0..0..0..2..3..1..3
..0..1..0..1..2..0..1....0..2..0..0..2..1..0....0..1..0..0..2..0..3
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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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