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A229692
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Number of defective 3-colorings of an n X 6 0..2 array connected horizontally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.
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1
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40, 5077, 230383, 8186713, 258006388, 7551515197, 210095323918, 5632122625852, 146747625919741, 3738362679893995, 93505337317628617, 2303524911169269100, 56025377123719298929, 1347778566401139093298, 32117071054579505478784
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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) = 75*a(n-1) - 2145*a(n-2) + 29368*a(n-3) - 205200*a(n-4) + 803115*a(n-5) - 1842183*a(n-6) + 2460375*a(n-7) - 1771470*a(n-8) + 531441*a(n-9) for n > 11.
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EXAMPLE
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Some solutions for n=3:
0 1 2 1 0 0 0 1 0 1 2 2 0 1 0 2 0 2 0 1 2 1 2 0
0 1 0 2 2 1 0 2 0 1 0 1 0 2 0 2 2 0 0 0 2 0 1 0
2 1 0 1 2 0 2 1 2 1 2 0 0 2 0 1 2 1 1 0 1 2 0 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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