The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A045063 Numbers whose base-4 representation contains no 0's and exactly two 3's. 0
15, 31, 47, 55, 59, 61, 62, 95, 111, 119, 123, 125, 126, 159, 175, 183, 187, 189, 190, 215, 219, 221, 222, 231, 235, 237, 238, 245, 246, 249, 250, 351, 367, 375, 379, 381, 382, 415, 431, 439, 443, 445, 446, 471, 475, 477, 478 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[500], DigitCount[#, 4, 0]==0&&DigitCount[#, 4, 3]==2&] (* Harvey P. Dale, Oct 05 2021 *)
CROSSREFS
Cf. A007090.
Sequence in context: A043346 A023719 A031467 * A044076 A319282 A125169
KEYWORD
nonn,base
AUTHOR
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 24 13:35 EDT 2024. Contains 372773 sequences. (Running on oeis4.)