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A224304
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Number of n X n 0..2 arrays with diagonals and rows unimodal and antidiagonals nondecreasing
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0
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3, 54, 1586, 45453, 1258372, 33934344, 911404794, 24751091876, 685844521863, 19455144713950, 564670981724616, 16727123708223072, 504154243224589510, 15415190705591603814
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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
..1..1..0....0..0..0....0..0..0....0..1..1....2..0..0....1..1..0....0..0..0
..2..1..1....2..0..0....1..2..0....1..2..0....0..2..1....2..1..1....1..0..0
..2..1..1....0..1..2....2..1..1....2..1..1....2..2..0....1..1..1....2..1..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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