OFFSET
0,3
COMMENTS
Self-inverse permutation of nonnegative integers.
It appears that a(m x) == 0 (mod m) for m = 2^k and m = 5*2^k, k >= 0, but not for other m. Is there a simple explanation? - M. F. Hasler, May 21 2021
LINKS
PROG
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Antti Karttunen, Dec 07 2015
STATUS
approved