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A229591
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Number of defective 3-colorings of a 6 X n 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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0, 5632, 119232, 2440692, 47091780, 890824020, 16551428868, 303527605644, 5505540489756, 98960332779288, 1765177724896272, 31280718324457188, 551219288985891468, 9666198588289311180, 168785901193243289256
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OFFSET
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1,2
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 60*a(n-1) - 1466*a(n-2) + 19056*a(n-3) - 143515*a(n-4) + 608478*a(n-5) - 957350*a(n-6) - 3924114*a(n-7) + 27201539*a(n-8) - 68079378*a(n-9) + 46537423*a(n-10) + 212613240*a(n-11) - 785654632*a(n-12) + 1389943104*a(n-13) - 1544105168*a(n-14) + 1125401088*a(n-15) - 524553472*a(n-16) + 142135296*a(n-17) - 17040384*a(n-18) for n > 26.
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EXAMPLE
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Some solutions for n=3:
0 1 0 0 1 2 0 1 2 0 1 0 0 1 2 0 1 2 0 0 1
0 2 1 2 0 1 2 0 2 2 1 2 0 1 0 0 1 2 1 2 1
2 0 2 2 0 1 1 1 2 2 0 1 0 2 0 2 0 0 0 2 0
2 1 2 2 1 0 0 1 0 2 0 0 1 2 1 2 1 0 0 2 1
2 1 2 0 2 0 2 1 0 1 2 1 0 1 2 2 1 0 1 0 2
0 1 0 0 2 1 0 1 0 1 2 1 0 1 0 0 1 2 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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