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A219935
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Number of nX4 arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX4 array
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1
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20, 196, 2070, 21512, 224794, 2225355, 20434119, 175334420, 1420391511, 10944254668, 80614381602, 569751343450, 3874457650832, 25407226592596, 160974645721734, 987110279457981, 5867881503628732, 33865515790471949
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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..1..0..2....2..2..0..1....0..1..0..0....1..0..1..1....3..0..0..0
..3..1..0..0....3..3..0..0....0..0..0..1....1..0..0..0....3..1..1..0
..3..3..2..1....3..3..2..2....3..0..0..0....2..2..0..0....3..3..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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