a(n) = prime(8*n - 2).

Terms

a(0) =13a(1) =43a(2) =79a(3) =113a(4) =163a(5) =199a(6) =251a(7) =293a(8) =349a(9) =397a(10) =443a(11) =491a(12) =557a(13) =601a(14) =647a(15) =701a(16) =757a(17) =821a(18) =863a(19) =929a(20) =983a(21) =1033a(22) =1091a(23) =1151a(24) =1213a(25) =1277a(26) =1307a(27) =1399a(28) =1451a(29) =1493