a(n) = 10*n + 7.

Terms

a(0) =7a(1) =17a(2) =27a(3) =37a(4) =47a(5) =57a(6) =67a(7) =77a(8) =87a(9) =97a(10) =107a(11) =117a(12) =127a(13) =137a(14) =147a(15) =157a(16) =167a(17) =177a(18) =187a(19) =197a(20) =207a(21) =217a(22) =227a(23) =237a(24) =247a(25) =257a(26) =267a(27) =277a(28) =287a(29) =297