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A054055
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Largest digit of n.
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81
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 2, 2, 2, 3, 4, 5, 6, 7, 8, 9, 3, 3, 3, 3, 4, 5, 6, 7, 8, 9, 4, 4, 4, 4, 4, 5, 6, 7, 8, 9, 5, 5, 5, 5, 5, 5, 6, 7, 8, 9, 6, 6, 6, 6, 6, 6, 6, 7, 8, 9, 7, 7, 7, 7, 7, 7, 7, 7, 8, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 2, 3, 4
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OFFSET
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0,3
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COMMENTS
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A095815(n) = n + a(n). [Reinhard Zumkeller, Aug 23 2011]
a(A007088(n)) = 1, n > 0; a(A136399(n)) > 1. [Reinhard Zumkeller, Apr 25 2012]
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LINKS
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_Reinhard Zumkeller_, Table of n, a(n) for n = 0..10000
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EXAMPLE
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a(12)=2 because 1<2
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MAPLE
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[seq(max(convert(n, base, 10)), n=0..120)];
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MATHEMATICA
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f[n_] := Sort[IntegerDigits[n]][[-1]]; Array[f, 105, 0] (* From Alonso del Arte, May 14 2011 *) (* and revised by Robert G. Wilson v, Aug 24 2011 *)
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PROG
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(Haskell)
a054055 = f 0 where
f m x | x <= 9 = max m x
| otherwise = f (max m d) x' where (x', d) = divMod x 10
-- Reinhard Zumkeller, Jun 20 2012, May 14 2011
(PARI) a(n)=vecmax(eval(Vec(Str(n)))) \\ Charles R Greathouse IV, Jun 16 2011
(MAGMA) [n eq 0 select 0 else Maximum(Intseq(n)): n in [0..104]]; // Bruno Berselli, Aug 24 2011
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CROSSREFS
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For bases 3 through 12 see A190592, A190593, A190594, A190595, A190596, A190597, A190598, A054055, A190599, A190600.
Cf. A054054.
Sequence in context: A065881 A133048 A214950 * A067456 A052429 A051802
Adjacent sequences: A054052 A054053 A054054 * A054056 A054057 A054058
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KEYWORD
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base,easy,nonn,changed
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AUTHOR
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Henry Bottomley, Apr 29 2000
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STATUS
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approved
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