a(n) = 121*n + 1.

Terms

a(0) =122a(1) =243a(2) =364a(3) =485a(4) =606a(5) =727a(6) =848a(7) =969a(8) =1090a(9) =1211a(10) =1332a(11) =1453a(12) =1574a(13) =1695a(14) =1816a(15) =1937a(16) =2058a(17) =2179a(18) =2300a(19) =2421a(20) =2542a(21) =2663a(22) =2784a(23) =2905a(24) =3026a(25) =3147a(26) =3268a(27) =3389a(28) =3510a(29) =3631