a(n) = 12*n + 7.

Terms

a(0) =7a(1) =19a(2) =31a(3) =43a(4) =55a(5) =67a(6) =79a(7) =91a(8) =103a(9) =115a(10) =127a(11) =139a(12) =151a(13) =163a(14) =175a(15) =187a(16) =199a(17) =211a(18) =223a(19) =235a(20) =247a(21) =259a(22) =271a(23) =283a(24) =295a(25) =307a(26) =319a(27) =331a(28) =343a(29) =355