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A267930
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Number of nX3 0..3 arrays with every repeated value in every row and column greater than the previous repeated value.
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2
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60, 3600, 178068, 8459154, 376812420, 16109362560, 663451196118, 26507885328672, 1031599522028772, 39244717326244854, 1463429227285701348, 53613261264275522982, 1933276790525967340428, 68725772580648925008792
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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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FORMULA
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Empirical recurrence of order 81 (see link above)
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EXAMPLE
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Some solutions for n=3
..2..3..3....2..2..3....0..1..3....0..1..1....1..0..0....1..2..2....0..1..2
..1..0..2....0..1..3....2..1..3....2..0..0....3..0..1....3..2..1....1..2..2
..3..1..1....0..2..0....0..0..2....2..2..1....2..2..0....3..0..0....2..2..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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