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A238724
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Number of nX6 0..2 arrays with no element equal to the sum modulo 3 of elements to its left or elements above it
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1
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8, 64, 704, 4636, 48538, 296384, 3022230, 17949864, 180550234, 1061806368, 10600024286, 62140749704, 617608768008, 3618173053808, 35862152511062, 210135126555696, 2079126382654402, 12188142518006216, 120451983593221798
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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 90 (see link above)
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EXAMPLE
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Some solutions for n=5
..1..2..1..2..1..2....2..1..2..1..2..1....2..1..1..2..2..1....2..1..2..1..2..1
..2..0..0..0..0..0....1..2..1..0..0..0....1..2..2..0..0..0....1..2..1..0..0..0
..2..0..0..0..0..1....1..2..1..2..1..0....1..2..1..0..0..0....2..1..2..0..1..2
..1..0..2..1..2..2....2..0..0..1..1..0....2..0..0..0..1..2....1..2..1..2..2..1
..1..0..2..1..2..1....1..0..0..0..0..2....1..0..0..0..2..2....1..2..1..2..1..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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