OFFSET
1,1
COMMENTS
Numbers b such that A255920(b) = 0.
Complement of A273786. - Felix Fröhlich, Dec 03 2020
LINKS
Felix Fröhlich, Table of n, a(n) for n = 1..10000
PROG
(PARI) is(b) = forprime(p=1, b-1, if(Mod(b, p^2)^(p-1)==1, return(0))); 1
CROSSREFS
KEYWORD
nonn
AUTHOR
Felix Fröhlich, Mar 11 2015
STATUS
approved