Primes p such that f(f(p)) is prime where f(x) = Phi_6(x).

Terms

a(0) =29a(1) =197a(2) =673a(3) =2297a(4) =3613a(5) =5923a(6) =6133a(7) =6917a(8) =8219a(9) =13553a(10) =15667a(11) =17137a(12) =21911a(13) =30941a(14) =33587a(15) =35407a(16) =38053a(17) =44017a(18) =45557a(19) =46663a(20) =51241a(21) =53453a(22) =65731a(23) =67187a(24) =82349a(25) =94151a(26) =115361a(27) =132287a(28) =143711a(29) =164011