OFFSET
1,1
COMMENTS
Numbers b such that A255920(n) = 1.
LINKS
Felix Fröhlich, Table of n, a(n) for n = 1..10000
PROG
(PARI) is(n) = my(i=0); forprime(p=1, n-1, if(Mod(n, p^2)^(p-1)==1, i++); if(i > 1, return(0))); i==1
CROSSREFS
KEYWORD
nonn
AUTHOR
Felix Fröhlich, Mar 12 2015
STATUS
approved