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A223858
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Number of n X n 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing
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0
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4, 100, 4884, 315124, 23738426, 1989679315, 181330154458, 17720685250743, 1838270364212150, 200766237618388230, 22925992371163981667, 2721355255765297425689
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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..1..2....0..0..2....0..0..1....1..0..0....3..0..0....0..1..3....0..1..1
..0..1..2....1..1..3....1..1..2....2..0..0....3..3..0....0..2..3....0..1..1
..0..3..2....1..2..3....1..3..2....3..2..2....3..3..0....0..2..3....3..3..3
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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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