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A229585
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Number of defective 3-colorings of an n X 7 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
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1
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96, 5724, 264300, 11035044, 435326724, 16551428868, 613195191972, 22285439501940, 798023885879412, 28242628279003332, 990013172442084324, 34429588531063458516, 1189375483329032617620, 40853134231990887545316
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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) = 84*a(n-1) - 2466*a(n-2) + 31428*a(n-3) - 206469*a(n-4) + 750384*a(n-5) - 1513404*a(n-6) + 1574640*a(n-7) - 656100*a(n-8).
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EXAMPLE
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Some solutions for n=3:
0 1 2 0 1 0 2 0 1 0 2 1 2 1 0 1 2 0 1 0 1
0 1 2 0 2 1 0 0 1 0 2 1 2 1 0 1 2 0 1 0 1
2 1 2 1 2 1 1 0 2 0 2 1 2 2 0 2 1 0 2 0 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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