Smallest nonempty set S containing prime divisors of 8k+1 for each k in S.

Terms

a(0) =3a(1) =5a(2) =7a(3) =11a(4) =13a(5) =17a(6) =19a(7) =23a(8) =29a(9) =31a(10) =37a(11) =41a(12) =43a(13) =47a(14) =59a(15) =67a(16) =83a(17) =89a(18) =97a(19) =103a(20) =109a(21) =131a(22) =137a(23) =179a(24) =199a(25) =233a(26) =373a(27) =1049a(28) =1097a(29) =1223