a(n) = 12*n + 5.

Terms

a(0) =5a(1) =17a(2) =29a(3) =41a(4) =53a(5) =65a(6) =77a(7) =89a(8) =101a(9) =113a(10) =125a(11) =137a(12) =149a(13) =161a(14) =173a(15) =185a(16) =197a(17) =209a(18) =221a(19) =233a(20) =245a(21) =257a(22) =269a(23) =281a(24) =293a(25) =305a(26) =317a(27) =329a(28) =341a(29) =353