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A219213
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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..2 nX4 array
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1
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10, 12, 113, 493, 2391, 10287, 42301, 165593, 623267, 2251824, 7816033, 26126804, 84401918, 264341846, 804616408, 2384472619, 6889408819, 19431099135, 53562044947, 144465807848, 381683301201, 988840284744, 2514551831707
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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..0....0..0..1..1....1..1..2..2....0..0..0..1....1..1..0..0
..0..0..0..0....0..0..0..1....1..1..2..2....0..0..0..1....1..1..0..0
..2..2..1..1....0..0..0..2....1..1..2..2....0..0..2..2....1..1..0..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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