

A043539


Number of distinct base12 digits of n.


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, 1, 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, 1, 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, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
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OFFSET

1,12


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..5000


FORMULA

From Michael De Vlieger, Aug 14 2017: (Start)
a(11) = 1 since 11 in base 12 is written with a single digit.
a(13) = 1 since 13 in base 12 is written "11".
a(14) = 2 since 14 in base 12 is written "12".
a(146) is the first appearance of 3 in this sequence, since it is written "102" in base 12.
(End)


MATHEMATICA

Table[Length[Select[DigitCount[n, 12], #>0&]], {n, 100}] (* Vincenzo Librandi, Aug 13 2017 *)


PROG

(PARI) a(n) = #Set(digits(n, 12)); \\ Michel Marcus, Aug 13 2017


CROSSREFS

Sequence in context: A043538 A297780 A043564 * A297781 A043565 A043540
Adjacent sequences: A043536 A043537 A043538 * A043540 A043541 A043542


KEYWORD

nonn,base


AUTHOR

Clark Kimberling


STATUS

approved



