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A206630
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Number of (n+1)X4 0..2 arrays with every 2X3 or 3X2 subblock having no more than four equal edges, and new values 0..2 introduced in row major order
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1
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1085, 86392, 6885875, 548812835, 43740991174, 3486207195767, 277854703424333, 22145337882995800, 1765008776141025599, 140673219629487281855, 11211816614428114906158, 893594616847882973762891
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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) = 66*a(n-1) +970*a(n-2) +9295*a(n-3) +33266*a(n-4) +72056*a(n-5) -224448*a(n-6) +362688*a(n-7) -1135552*a(n-8) +493824*a(n-9) -311808*a(n-10) +294912*a(n-11)
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EXAMPLE
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Some solutions for n=4
..0..0..0..1....0..1..2..0....0..0..0..0....0..0..0..0....0..1..0..2
..2..0..1..0....1..2..2..0....0..1..2..1....0..1..0..1....2..2..0..1
..0..2..1..1....0..1..1..2....0..0..2..0....1..2..2..2....2..0..1..1
..2..0..0..1....0..1..2..1....0..2..1..2....1..2..2..0....2..1..0..1
..2..2..2..1....2..2..0..0....1..1..1..1....1..2..1..1....1..2..2..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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