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A229532
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Number of defective 3-colorings of an n X 6 0..2 array connected horizontally, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
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1
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40, 368, 7460, 130854, 2171944, 34811238, 544403948, 8359264560, 126546766896, 1894158617022, 28090954101848, 413405522888606, 6044542909770790, 87888904584082718, 1271780829814090170, 18325726435067557004
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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) = 36*a(n-1) - 436*a(n-2) + 1854*a(n-3) + 340*a(n-4) - 19128*a(n-5) + 23849*a(n-6) + 56184*a(n-7) - 108224*a(n-8) - 40816*a(n-9) + 160400*a(n-10) - 34136*a(n-11) - 83203*a(n-12) + 42628*a(n-13) + 6468*a(n-14) - 6334*a(n-15) + 204*a(n-16) + 240*a(n-17) - 25*a(n-18) for n > 19.
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EXAMPLE
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Some solutions for n=4:
0 1 0 1 0 1 0 1 0 2 1 2 0 1 2 0 1 0 0 0 1 2 1 2
2 1 2 1 2 1 0 1 0 2 0 2 0 1 2 0 2 0 1 2 1 2 1 2
2 0 2 0 2 1 0 1 0 1 0 1 2 1 2 1 2 1 1 2 0 2 1 2
0 1 2 1 2 1 1 2 0 2 0 1 2 0 2 1 0 0 0 2 0 2 1 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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