a(n) = 7*n + 4.

Terms

a(0) =4a(1) =11a(2) =18a(3) =25a(4) =32a(5) =39a(6) =46a(7) =53a(8) =60a(9) =67a(10) =74a(11) =81a(12) =88a(13) =95a(14) =102a(15) =109a(16) =116a(17) =123a(18) =130a(19) =137a(20) =144a(21) =151a(22) =158a(23) =165a(24) =172a(25) =179a(26) =186a(27) =193a(28) =200a(29) =207