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A223891
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Number of nX4 0..2 arrays with row sums and column sums unimodal
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1
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46, 3298, 187103, 8878492, 367772497, 13710418065, 469842794992, 15032271992980, 454296896353698, 13086457136814204, 361878926424024255, 9661547783502821964, 250204578633128649051, 6309270603849297385833
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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..2..2....0..1..0..2....0..1..0..1....0..1..1..2
..2..0..1..1....0..0..1..1....1..2..2..2....1..1..2..0....2..2..2..2
..0..1..2..1....0..0..0..0....0..0..2..1....0..1..2..0....1..0..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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