OFFSET
1,1
LINKS
T. D. Noe, Table of n, a(n) for n=1..1000
MATHEMATICA
Prime[ Select[ Range[24000], PrimitiveRoot[ Prime[ # ] ] == 21 & ] ]
(* or *)
Select[ Prime@Range@24000, PrimitiveRoot@# == 21 &] (* Robert G. Wilson v, May 11 2001 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Klaus Brockhaus, Apr 25 2001
STATUS
approved