OFFSET
1,1
COMMENTS
EXAMPLE
See A306500 for the example that shows a(18) = 7.
PROG
(PARI) b(n) = my(i=0); forprime(p=2, oo, i+=kronecker(n, p); if(i>0, return(p)))
print1(23338590792, ", "); for(n=4, 300, if(isfundamental(-n), print1(primepi(b(-n)), ", ")))
CROSSREFS
KEYWORD
nonn
AUTHOR
Jianing Song, Feb 19 2019
STATUS
approved