Primes p such that x^3 = 20 has no solution mod p.

Terms

a(0) =13a(1) =31a(2) =37a(3) =43a(4) =67a(5) =73a(6) =79a(7) =103a(8) =109a(9) =139a(10) =157a(11) =163a(12) =181a(13) =199a(14) =211a(15) =223a(16) =229a(17) =241a(18) =271a(19) =277a(20) =283a(21) =307a(22) =313a(23) =331a(24) =337a(25) =349a(26) =367a(27) =379a(28) =397a(29) =409