Primes with 21 as smallest positive primitive root.

Terms

a(0) =409a(1) =4441a(2) =12841a(3) =15889a(4) =22751a(5) =30091a(6) =41809a(7) =55921a(8) =60889a(9) =77167a(10) =82183a(11) =99823a(12) =103561a(13) =110281a(14) =120391a(15) =127249a(16) =136471a(17) =139201a(18) =155671a(19) =157351a(20) =161881a(21) =164209a(22) =180361a(23) =180799a(24) =182839a(25) =183823a(26) =187711a(27) =191047a(28) =230929a(29) =250423