List of primitive prime divisors of the numbers (4^n-1)/3 (A002450) in their order of occurrence.

Terms

a(0) =5a(1) =3a(2) =7a(3) =17a(4) =11a(5) =31a(6) =13a(7) =43a(8) =127a(9) =257a(10) =19a(11) =73a(12) =41a(13) =23a(14) =89a(15) =683a(16) =241a(17) =2731a(18) =8191a(19) =29a(20) =113a(21) =151a(22) =331a(23) =65537a(24) =43691a(25) =131071a(26) =37a(27) =109a(28) =174763a(29) =524287