OFFSET
1,1
COMMENTS
Also numbers that cannot be expressed as the two-digit numbers a b (base r) and b a (base s) for two different smaller bases r and s (i.e., 2-digit "reversals"), and the numbers that cannot be expressed as "reversals" of any length for two different smaller bases. I can prove this. - Francis J. McDonnell, Jul 28 2015
LINKS
Sascha Kurz, A059809 is finite (shows that there are no other terms) [Broken link]
EXAMPLE
8 written in bases 2 through 7 is 1000, 22, 20, 13, 12, 11 and none of these are permutations of another one.
CROSSREFS
KEYWORD
base,nonn,fini,full
AUTHOR
Erich Friedman, Feb 24 2001
EXTENSIONS
More terms from Naohiro Nomoto, Oct 04 2001, who remarks that there are no others < 10000.
Offset set to 1 by Michel Marcus, Aug 03 2015
STATUS
approved