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A268002
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Number of nX4 0..4 arrays with every repeated value in every row and column equal to the previous repeated value, and new values introduced in row-major sequential order.
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1
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14, 3552, 1880990, 982227549, 477324637497, 217487430054270, 94140118844723912, 39105380203795427033, 15706598714125002923524, 6134460937389813920089978, 2340046547460981434121930658
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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=2
..0..1..1..0....0..0..1..2....0..1..0..2....0..1..2..1....0..1..0..0
..0..1..2..2....0..1..3..3....3..3..0..1....3..0..4..1....2..0..3..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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