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A190592
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Maximal digit in base-3 expansion of n.
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5
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0, 1, 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = 2 if n == 2 (mod 3), a(1)=1, otherwise a(n) = a(floor(n/3)). - Robert Israel, Aug 11 2017
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MAPLE
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[seq(max(convert(n, base, 3)), n=0..120)];
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MATHEMATICA
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Join[{0}, gl[n_] := Module[{idn = IntegerDigits[n, 3]}, Max[idn]]; Array[gl, 100]] (* Vincenzo Librandi, Aug 12 2017 *)
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PROG
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(PARI) a(n) = if (n==0, 0, vecmax(digits(n, 3))); \\ Michel Marcus, Aug 12 2017
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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