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 A043539 Number of distinct base 12 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 (list; graph; refs; listen; history; text; internal format)
 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 STATUS approved

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Last modified April 11 16:42 EDT 2021. Contains 342888 sequences. (Running on oeis4.)