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A222830
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Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order
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1
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0, 32, 2120, 114782, 5459252, 346343088, 17812721025, 1142470649401, 58980648163832, 3852418637358246, 200706673436292108, 13243427433214319023, 693625799476691177636, 46113394821687632448294, 2425015336246882407219638
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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 for n=3
..0..0..1....0..1..0....0..1..0....0..1..2....0..1..2....0..1..2....0..1..2
..2..1..0....2..1..0....2..1..1....0..1..0....0..0..3....2..1..2....3..0..2
..3..3..2....1..3..2....1..2..1....2..3..2....2..0..2....1..2..1....2..3..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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