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A206203
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Number of (n+1)X6 0..3 arrays with every 2X3 or 3X2 subblock having exactly one clockwise edge increases
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1
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29724, 22576, 27400, 70168, 118936, 236488, 713408, 1226384, 2475328, 7286528, 12463904, 24915264, 72915680, 124641664, 249152672, 729156800, 1246416640, 2491526720, 7291568000, 12464166400, 24915267200, 72915680000, 124641664000
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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: a(n) = 10*a(n-3) for n>15
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EXAMPLE
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Some solutions for n=4
..1..1..2..2..1..0....3..0..0..1..1..1....0..0..2..1..1..0....3..0..0..1..1..1
..1..2..2..2..3..3....3..0..0..0..1..1....0..0..1..1..1..0....3..0..0..0..1..1
..2..2..2..3..3..3....3..3..0..0..0..1....0..1..1..1..3..3....3..3..0..0..0..1
..2..2..3..3..3..0....3..3..3..0..0..0....1..1..1..3..3..3....3..3..3..0..0..0
..2..3..3..3..0..0....2..3..3..3..0..0....1..1..3..3..3..1....0..3..3..3..0..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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