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A268007
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Number of nX3 0..3 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.
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2
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4, 159, 7445, 381958, 18691624, 911680225, 43653230106, 2074179818184, 97646068246936, 4569116947346091, 212625847203245237, 9853280365275338623, 455001756707087106187, 20951793886914002899807, 962541121729004548522176
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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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FORMULA
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Empirical recurrence of order 75 (see link above)
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EXAMPLE
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Some solutions for n=3
..0..1..0....0..0..1....0..0..1....0..1..0....0..1..0....0..1..1....0..1..2
..1..2..2....2..3..0....1..2..0....1..2..3....1..2..3....2..3..2....2..2..0
..1..2..1....0..3..1....0..0..1....0..0..1....3..2..0....0..0..2....2..1..3
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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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