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A239335
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Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it, modulo 4
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1
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12, 172, 2187, 27341, 346028, 4360887, 54774178, 688266175, 8649330696, 108663198449, 1365050486095, 17148274201252, 215420739233431, 2706135761424448, 33994663679676011, 427043158643798758
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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 64 (see link above)
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EXAMPLE
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Some solutions for n=4
..0..0..0....2..0..0....0..0..2....2..0..0....0..2..2....0..0..2....0..0..2
..0..2..0....0..2..0....2..2..0....0..0..0....0..0..3....2..2..2....2..2..0
..0..2..2....2..2..0....0..0..0....0..0..2....0..0..3....0..3..1....3..2..3
..2..2..3....2..0..0....2..0..2....0..0..3....0..2..0....0..2..2....3..1..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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