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A023733 Numbers with no 3's in base-5 expansion. 8
0, 1, 2, 4, 5, 6, 7, 9, 10, 11, 12, 14, 20, 21, 22, 24, 25, 26, 27, 29, 30, 31, 32, 34, 35, 36, 37, 39, 45, 46, 47, 49, 50, 51, 52, 54, 55, 56, 57, 59, 60, 61, 62, 64, 70, 71, 72, 74, 100, 101, 102, 104, 105, 106, 107, 109, 110, 111, 112, 114 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
EXAMPLE
14 in base 5 is 24, which contains no 3's, so 14 is in the sequence.
15 in base 5 is 30, so 15 is not in the sequence.
MAPLE
seq(`if`(numboccur(3, convert(n, base, 5))=0, n, NULL), n=0..127); # Nathaniel Johnston, Jun 27 2011
MATHEMATICA
Select[Range[0, 124], Count[IntegerDigits[#, 5], 3] == 0 &]
PROG
(PARI) is(n)=while(n>3, if(n%5==3, return(0)); n\=5); 1 \\ Charles R Greathouse IV, Feb 12 2017
(Scala) (0 to 124).filter(Integer.toString(_, 5).indexOf("3") == -1) // Alonso del Arte, Feb 05 2019
CROSSREFS
Sequence in context: A349829 A230633 A024616 * A154112 A039101 A140102
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved

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Last modified May 20 14:08 EDT 2024. Contains 372717 sequences. (Running on oeis4.)