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A011533
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Numbers that contain a 3.
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28
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3, 13, 23, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 43, 53, 63, 73, 83, 93, 103, 113, 123, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 143, 153, 163, 173, 183, 193, 203, 213, 223, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 243, 253
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
James Grime and Brady Haran, 3 is everywhere, Numberphile video, 2012.
Index entries for 10-automatic sequences.
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FORMULA
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a(n) ~ n. - Charles R Greathouse IV, Aug 28 2012
For m >= 1, a(10^m - 9^m) = 10^m-7, a(10^m - 9^m + 1) = 10^m + 3. - Robert Israel, Jan 11 2016
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MAPLE
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M:= 3: # to get all terms of up to M digits
B:= {3}: A:= {3}:
for i from 2 to M do
B:= map(t -> seq(10*t+j, j=0..9), B) union
{seq(10*x+3, x=10^(i-2)..10^(i-1)-1)}:
A:= A union B;
od:
sort(convert(A, list)); # Robert Israel, Jan 11 2016
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MATHEMATICA
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Select[Range[600] - 1, DigitCount[#, 10, 3]>0 &] (* Vincenzo Librandi, Jan 11 2016 *)
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PROG
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(Haskell)
a011533 n = a011533_list !! (n-1)
a011533_list = filter ((elem '3') . show) [0..]
-- Reinhard Zumkeller, Apr 10 2015
(Magma) [n: n in [0..500] | 3 in Intseq(n)]; // Vincenzo Librandi, Jan 11 2016
(PARI) isok(n)=my(d=digits(n)); for (k=1, #d, if (d[k] == 3, return (1))); \\ Michel Marcus, Jan 11 2016
(GAP) Filtered([1..260], n->3 in ListOfDigits(n)); # Muniru A Asiru, Feb 23 2019
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CROSSREFS
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Complement: A052405.
Cf. A016189.
Numbers that contain a digit k: A011531 (k=1), A011532 (k=2), A011534 (k=4), A011535 (k=5), A011536 (k=6), A011537 (k=7), A011538 (k=8), A011539 (k=9), A011540 (k=0).
Sequence in context: A180970 A135580 A166566 * A277965 A043501 A277590
Adjacent sequences: A011530 A011531 A011532 * A011534 A011535 A011536
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KEYWORD
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nonn,base,easy
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AUTHOR
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N. J. A. Sloane
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STATUS
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approved
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