OFFSET
1
COMMENTS
Characteristic function of practical numbers, A005153.
LINKS
FORMULA
a(n) = [A030057(n) > n], where [ ] is the Iverson bracket.
PROG
(PARI) A322860 = is_A005153 \\ Please do not duplicate code by pasting copies from one place to others, it will be near to impossible to track down all copies if something has to be corrected or improved. - M. F. Hasler, Jun 19 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 31 2018
STATUS
approved