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A223890
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Number of n X 3 0..2 arrays with row sums and column sums unimodal.
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1
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22, 564, 11264, 187103, 2719602, 35688774, 432076735, 4902528769, 52736915601, 542569977315, 5375623914286, 51570049073953, 481136370463155, 4381314203869479, 39057034725462456, 341691760691655645
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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
..2..2..0....2..2..1....0..2..1....1..2..0....0..0..1....2..1..1....0..0..0
..0..2..2....1..1..1....2..1..1....2..1..0....0..1..2....2..2..2....0..1..0
..2..0..2....0..2..1....1..2..0....1..0..1....0..2..2....0..1..0....2..1..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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