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A224256
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Number of n X n 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing
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0
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3, 36, 648, 12467, 238366, 4480391, 83124099, 1530419762, 28072690614, 514262753781, 9420094252771
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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=3
..0..2..0....0..1..0....0..0..0....1..1..0....1..2..0....2..1..1....0..1..0
..0..2..0....0..1..0....2..0..0....2..2..1....2..2..0....2..2..2....2..2..2
..0..2..0....1..1..2....2..1..0....2..2..2....2..2..0....2..2..2....2..2..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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