Primes p such that x^3 = 21 has a solution mod p.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =17a(7) =23a(8) =29a(9) =41a(10) =43a(11) =47a(12) =53a(13) =59a(14) =71a(15) =73a(16) =79a(17) =83a(18) =89a(19) =101a(20) =107a(21) =113a(22) =131a(23) =137a(24) =149a(25) =163a(26) =167a(27) =173a(28) =179a(29) =191