a(n) = 10*n + 3.

Terms

a(0) =3a(1) =13a(2) =23a(3) =33a(4) =43a(5) =53a(6) =63a(7) =73a(8) =83a(9) =93a(10) =103a(11) =113a(12) =123a(13) =133a(14) =143a(15) =153a(16) =163a(17) =173a(18) =183a(19) =193a(20) =203a(21) =213a(22) =223a(23) =233a(24) =243a(25) =253a(26) =263a(27) =273a(28) =283a(29) =293