Primes p of the form 3k+1 such that Sum_{x=1..p} cos(2*Pi*x^3/p) > sqrt(p).

Terms

a(0) =7a(1) =31a(2) =43a(3) =67a(4) =73a(5) =79a(6) =103a(7) =127a(8) =163a(9) =181a(10) =223a(11) =229a(12) =271a(13) =277a(14) =307a(15) =313a(16) =337a(17) =349a(18) =409a(19) =421a(20) =439a(21) =457a(22) =463a(23) =499a(24) =523a(25) =577a(26) =643a(27) =661a(28) =673a(29) =691