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!)
A032859 Numbers whose base-4 representation Sum_{i=0..m} d(i)*4^i has d(m) > d(m-1) < d(m-2) > ... 5
0, 1, 2, 3, 4, 8, 9, 12, 13, 14, 17, 18, 19, 33, 34, 35, 38, 39, 49, 50, 51, 54, 55, 59, 68, 72, 73, 76, 77, 78, 132, 136, 137, 140, 141, 142, 152, 153, 156, 157, 158, 196, 200, 201, 204, 205, 206, 216, 217, 220, 221, 222, 236, 237, 238 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
MATHEMATICA
Join[{0}, Select[Range[250], (Sign/@Differences[IntegerDigits[#, 4]]) == PadRight[ {}, IntegerLength[#, 4]-1, {-1, 1}]&]] (* Harvey P. Dale, Sep 18 2022 *)
CROSSREFS
Cf. A032858..A032865 for bases 3..10.
Cf. A306106..A306111 and A297147 for bases 3..9 and 10.
Sequence in context: A116111 A253278 A184807 * A032883 A023786 A018231
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
a(1)=0 inserted by Georg Fischer, Dec 18 2020
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 April 13 21:58 EDT 2024. Contains 371645 sequences. (Running on oeis4.)