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A206690
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Number of nX6 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order
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1
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8, 376, 2816, 24492, 213788, 1915580, 17277556, 156946368, 1429962032, 13057140562, 119353104128, 1091748256156, 9990044761998, 91434371494388, 836958605238016, 7661779056726008, 70141114109343664, 642134221496445414
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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=4
..0..1..2..3..1..0....0..1..2..3..1..2....0..1..2..0..1..3....0..1..2..3..1..0
..2..3..1..0..2..1....1..0..3..1..0..3....1..0..3..1..2..0....2..3..1..2..3..1
..1..2..3..1..0..3....2..3..0..2..3..1....3..2..1..3..0..1....1..2..0..1..2..3
..0..1..2..3..1..0....3..1..2..3..1..2....0..1..2..0..1..2....3..0..2..3..1..2
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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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