Primes of the form 666*n + 1.

Terms

a(0) =1999a(1) =3331a(2) =4663a(3) =6661a(4) =7993a(5) =10657a(6) =14653a(7) =15319a(8) =16651a(9) =17317a(10) =21313a(11) =23311a(12) =23977a(13) =25309a(14) =26641a(15) =30637a(16) =33301a(17) =33967a(18) =37963a(19) =38629a(20) =40627a(21) =41959a(22) =43291a(23) =44623a(24) =45289a(25) =47287a(26) =48619a(27) =51283a(28) =51949a(29) =53281