Smallest nonempty set S containing prime divisors of 6k+7 for each k in S.

Terms

a(0) =5a(1) =11a(2) =13a(3) =17a(4) =19a(5) =23a(6) =29a(7) =37a(8) =53a(9) =59a(10) =67a(11) =71a(12) =73a(13) =89a(14) =101a(15) =107a(16) =109a(17) =137a(18) =149a(19) =181a(20) =191a(21) =229a(22) =241a(23) =269a(24) =277a(25) =293a(26) =349a(27) =353a(28) =409a(29) =421