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A190598 Maximal digit in base-9 expansion of n. 1
0, 1, 2, 3, 4, 5, 6, 7, 8, 1, 1, 2, 3, 4, 5, 6, 7, 8, 2, 2, 2, 3, 4, 5, 6, 7, 8, 3, 3, 3, 3, 4, 5, 6, 7, 8, 4, 4, 4, 4, 4, 5, 6, 7, 8, 5, 5, 5, 5, 5, 5, 6, 7, 8, 6, 6, 6, 6, 6, 6, 6, 7, 8, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 2, 3, 4, 5, 6, 7, 8, 1, 1, 2, 3, 4, 5, 6, 7, 8, 2, 2, 2, 3, 4, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..104.

FORMULA

From Matej Veselovac, Jul 23 2021: (Start)

a(n) = 1 iff n is in A033046.

a(n) = 8 iff n is in A338090. (End)

MATHEMATICA

a[n_] := Max[IntegerDigits[n, 9]]; (* Matej Veselovac, Jul 23 2021 *)

PROG

(PARI) a(n) = if (n, vecmax(digits(n, 9)), 0); \\ Michel Marcus, Jul 19 2020

(Python)

from sympy.ntheory.digits import digits

def a(n): return max(digits(n, 9)[1:])

print([a(n) for n in range(105)]) # Michael S. Branicky, Jul 23 2021

CROSSREFS

Cf. A007095 (base 9), A033046 (indices of 1's), A338090 (indices of 8's).

Cf. A054055 (maximal digit in decimal).

Sequence in context: A228822 A255829 A277547 * A338882 A053844 A010887

Adjacent sequences:  A190595 A190596 A190597 * A190599 A190600 A190601

KEYWORD

nonn,base,easy,changed

AUTHOR

N. J. A. Sloane, May 13 2011

STATUS

approved

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Last modified August 5 18:00 EDT 2021. Contains 346488 sequences. (Running on oeis4.)