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A239821
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Number of 3Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it, modulo 4
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1
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11, 113, 1480, 18728, 232272, 2912793, 36627126, 459870638, 5774508494, 72538478424, 911227478673, 11446501405086, 143789611879946, 1806288798172920, 22690641341877163, 285040443527806965
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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
..2..0..0..3....3..2..2..0....2..0..0..0....3..2..0..0....3..2..3..2
..1..2..0..1....2..0..0..0....1..3..2..0....1..0..0..0....3..2..2..0
..3..1..3..0....3..1..1..2....2..3..2..2....3..2..3..2....1..3..3..1
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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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