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A222997
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Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order
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1
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2, 45, 534, 13655, 184475, 4816824, 67178532, 1775642951, 25210032184, 671307448829, 9642197765265, 258026527507712, 3736712737181234, 100342585948460924, 1462116657698476202, 39363517125888222983
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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....0..1..1....0..1..1....0..1..2....0..1..0....0..1..2....0..1..1
..0..2..0....1..2..0....2..1..2....1..2..0....2..1..1....2..1..0....0..2..0
..2..2..1....1..2..0....2..1..2....1..2..0....2..0..1....0..2..2....0..1..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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