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A224006
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Number of n X n 0..2 arrays with rows nondecreasing and antidiagonals unimodal
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0
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3, 36, 868, 28541, 1108969, 47735665, 2200064042, 106468976628, 5346274348879, 276427362685199, 14638913051219770, 790954334539356094, 43473056647367595435, 2424900281957535784114, 137007153893707984264455
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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..2..2....1..1..1....0..0..2....1..1..2....0..0..2....2..2..2....1..1..1
..1..1..1....1..1..2....0..1..2....0..0..2....0..0..1....1..1..2....0..0..0
..0..1..2....0..0..0....1..2..2....0..0..0....0..2..2....1..2..2....0..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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