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!)
A321797 Delete the decimal digits of n that appear exactly once; write 0 if all digits disappear. 4
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 22, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 44, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 55, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 66, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 77, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 88, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 99, 0, 11, 0, 0, 0, 0, 0, 0, 0, 0, 11, 111, 11, 11, 11, 11, 11, 11, 11, 11, 0, 11, 22, 0, 0, 0, 0, 0, 0, 0, 0, 11, 0, 33, 0, 0, 0, 0, 0, 0, 0, 11, 0, 0, 44, 0, 0, 0, 0, 0, 0, 11, 0, 0, 0, 55, 0, 0, 0, 0, 0, 11, 0, 0, 0, 0, 66, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 77, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 88, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 99 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,12
COMMENTS
A companion sequence to A320486.
Digits that appear exactly once in n are erased. Leading zeros are erased unless the result is 0. If all digits are erased, we write 0 for the result (A321800 is another version, which uses -1 for the empty string).
More than the usual number of terms are shown in order to reach some interesting examples.
LINKS
EXAMPLE
12321 becomes 1221, 1123 becomes 11, 11231 becomes 111, and 100223 becomes 22 (as we don't accept leading zeros). Note that 12345 disappears immediately and we get 0.
PROG
(Python)
def A321797(n):
return int('0'+''.join(d if str(n).count(d) != 1 else '' for d in str(n)))
CROSSREFS
Sequence in context: A279540 A321538 A321803 * A113043 A110408 A179920
KEYWORD
nonn,base
AUTHOR
Chai Wah Wu, Nov 19 2018
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 March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)