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A212932
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Number of 3 X n 0..n-1 arrays with no column j greater than column j-1 in all rows.
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1
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1, 63, 18226, 14177855, 23124921876, 68264066143602, 330676305397366860, 2450628904209116751423, 26359630332235218287361280, 394964706663355785627860751188, 7977079877065700492793254299414812
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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
..1..1..1....0..0..0....1..1..1....0..1..2....0..1..1....2..1..0....1..0..1
..2..1..1....1..2..0....1..0..1....1..2..0....0..0..2....2..1..2....1..2..2
..2..1..1....1..2..2....2..1..2....0..0..0....0..0..2....2..1..1....2..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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