a(n) = 2*p + 2*n - 1, where p is the least prime such that next_prime(2*p) - 2*p = 2*n - 1.

Terms

a(0) =5a(1) =17a(2) =67a(3) =149a(4) =127a(5) =673a(6) =1151a(7) =541a(8) =1399a(9) =1973a(10) =2203a(11) =4201a(12) =2999a(13) =4861a(14) =5623a(15) =20477a(16) =10007a(17) =12889a(18) =25523a(19) =19661a(20) =34123a(21) =58889a(22) =25523a(23) =40693a(24) =40343a(25) =35729a(26) =106087a(27) =107441a(28) =34123a(29) =134581