a(n) = 8*n^2 + 20*n + 1.

Terms

a(0) =1a(1) =29a(2) =73a(3) =133a(4) =209a(5) =301a(6) =409a(7) =533a(8) =673a(9) =829a(10) =1001a(11) =1189a(12) =1393a(13) =1613a(14) =1849a(15) =2101a(16) =2369a(17) =2653a(18) =2953a(19) =3269a(20) =3601a(21) =3949a(22) =4313a(23) =4693a(24) =5089a(25) =5501a(26) =5929a(27) =6373a(28) =6833a(29) =7309