[go: up one dir, main page]
login
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A121023
Multiples of 3 containing a 3 in their decimal representation.
34
3, 30, 33, 36, 39, 63, 93, 123, 132, 135, 138, 153, 183, 213, 231, 234, 237, 243, 273, 300, 303, 306, 309, 312, 315, 318, 321, 324, 327, 330, 333, 336, 339, 342, 345, 348, 351, 354, 357, 360, 363, 366, 369, 372, 375, 378, 381, 384, 387, 390, 393, 396, 399
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Intersection of A008585 and A011533.
The graph of this sequence is (roughly) self-similar: it has the same appearance when the scale is multiplied by 10. - M. F. Hasler, Mar 09 2014
LINKS
M. F. Hasler, Table of n, a(n) for n = 1..3440
Index entries for 10-automatic sequences.
FORMULA
a(n) ~ 3n. - Charles R Greathouse IV, Mar 31 2016
MATHEMATICA
Select[3*Range[500], MemberQ[IntegerDigits[#], 3] &] (* Paolo Xausa, Feb 25 2024 *)
PROG
(PARI) is(n)=!(n%3)&&setsearch(Set(digits(n)), 3) \\ M. F. Hasler, Mar 09 2014
(PARI) c=0; forstep(n=3, 3e4, 3, is(n)&write("/tmp/b121023.txt", c++" "n))
CROSSREFS
Cf. A121041, A011531, A121022, A121024, A121025, A121026, A121027, A121028, A121029, A121030, A121031, A121032, A121033, A121034, A121035, A121036, A121037, A121038, A121039, A121040.
Sequence in context: A217395 A077679 A045863 * A124520 A350814 A169966
Adjacent sequences: A121020 A121021 A121022 * A121024 A121025 A121026
KEYWORD
nonn,base,easy
AUTHOR
Reinhard Zumkeller, Jul 21 2006
EXTENSIONS
Typo in comment fixed by Reinhard Zumkeller, May 01 2011
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified October 4 18:18 EDT 2024. Contains 376520 sequences.
License Agreements, Terms of Use, Privacy Policy