Primes together with primes multiplied by 2.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =6a(5) =7a(6) =10a(7) =11a(8) =13a(9) =14a(10) =17a(11) =19a(12) =22a(13) =23a(14) =26a(15) =29a(16) =31a(17) =34a(18) =37a(19) =38a(20) =41a(21) =43a(22) =46a(23) =47a(24) =53a(25) =58a(26) =59a(27) =61a(28) =62a(29) =67