Primes p such that x^3 = 7 has no solution mod p.

Terms

a(0) =13a(1) =31a(2) =37a(3) =43a(4) =61a(5) =67a(6) =79a(7) =97a(8) =103a(9) =109a(10) =127a(11) =139a(12) =151a(13) =163a(14) =193a(15) =199a(16) =211a(17) =229a(18) =241a(19) =271a(20) =277a(21) =283a(22) =307a(23) =349a(24) =379a(25) =397a(26) =409a(27) =433a(28) =457a(29) =499