Smallest nonempty set S containing prime divisors of 6k+5 for each k in S.

Terms

a(0) =7a(1) =11a(2) =13a(3) =17a(4) =19a(5) =23a(6) =29a(7) =31a(8) =37a(9) =41a(10) =47a(11) =53a(12) =61a(13) =67a(14) =71a(15) =73a(16) =83a(17) =89a(18) =97a(19) =103a(20) =107a(21) =113a(22) =131a(23) =137a(24) =149a(25) =157a(26) =179a(27) =191a(28) =193a(29) =211