a(n) = 10*n^2 + 7.

Terms

a(0) =7a(1) =17a(2) =47a(3) =97a(4) =167a(5) =257a(6) =367a(7) =497a(8) =647a(9) =817a(10) =1007a(11) =1217a(12) =1447a(13) =1697a(14) =1967a(15) =2257a(16) =2567a(17) =2897a(18) =3247a(19) =3617a(20) =4007a(21) =4417a(22) =4847a(23) =5297a(24) =5767a(25) =6257a(26) =6767a(27) =7297a(28) =7847a(29) =8417