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A219456
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Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 nX4 array
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1
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20, 26, 498, 3422, 27967, 197308, 1324860, 8405212, 51417327, 303703636, 1731421125, 9525742325, 50654533963, 260914306516, 1304341448963, 6337774514024, 29964888604613, 137989085373438, 619551753355165
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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..0..0..2....0..0..1..1....1..1..1..2....0..0..1..2....0..0..0..3
..0..0..0..2....0..0..1..1....1..1..1..2....0..0..1..2....0..0..0..2
..1..1..1..2....2..2..1..1....1..1..1..3....2..2..2..3....2..2..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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