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A201427
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Number of nX3 0..2 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other
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1
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1, 13, 99, 622, 3406, 16399, 70192, 272801, 974066, 3232454, 10054552, 29532523, 82397798, 219500791, 560691234, 1378470505, 3272266551, 7521401992, 16780966687, 36420942317, 77044661996, 159126985181, 321388308477
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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=7
..0..0..2....0..0..1....0..0..2....0..0..1....0..1..2....0..0..2....0..0..1
..0..0..2....0..1..2....0..1..1....0..0..2....0..2..0....0..2..0....0..2..1
..0..1..2....1..0..0....0..2..1....0..2..0....0..2..1....0..2..2....1..1..2
..0..1..2....1..0..1....0..2..1....1..1..0....0..2..1....1..0..1....1..1..2
..1..0..1....1..2..2....0..2..1....1..1..2....0..2..1....1..0..1....1..2..2
..1..2..2....1..2..2....2..1..0....2..1..1....1..2..0....2..1..1....2..0..0
..2..1..1....2..2..0....2..2..1....2..2..2....1..2..1....2..2..1....2..0..0
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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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