Smallest nonempty set S containing prime divisors of 8k+5 for each k in S.

Terms

a(0) =3a(1) =7a(2) =11a(3) =13a(4) =17a(5) =23a(6) =29a(7) =31a(8) =47a(9) =53a(10) =59a(11) =61a(12) =67a(13) =79a(14) =109a(15) =127a(16) =541a(17) =619a(18) =661a(19) =743a(20) =877a(21) =1021a(22) =2333a(23) =4957