a(n) = 8n + 3.

Terms

a(0) =3a(1) =11a(2) =19a(3) =27a(4) =35a(5) =43a(6) =51a(7) =59a(8) =67a(9) =75a(10) =83a(11) =91a(12) =99a(13) =107a(14) =115a(15) =123a(16) =131a(17) =139a(18) =147a(19) =155a(20) =163a(21) =171a(22) =179a(23) =187a(24) =195a(25) =203a(26) =211a(27) =219a(28) =227a(29) =235