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A043540 Number of distinct base-13 digits of n. 1
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,13

LINKS

Table of n, a(n) for n=1..90.

MATHEMATICA

Table[Length[Union[IntegerDigits[n, 13]]], {n, 120}] (* Harvey P. Dale, May 12 2019 *)

PROG

(PARI) vector(90, n, #vecsort(digits(n, 13), , 8)) \\ Michel Marcus, Aug 19 2015

CROSSREFS

Sequence in context: A043539 A297781 A043565 * A297782 A043566 A043541

Adjacent sequences:  A043537 A043538 A043539 * A043541 A043542 A043543

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 27 16:48 EDT 2022. Contains 354110 sequences. (Running on oeis4.)