a(n) = 24*n^2 + 52*n + 29.

Terms

a(0) =29a(1) =105a(2) =229a(3) =401a(4) =621a(5) =889a(6) =1205a(7) =1569a(8) =1981a(9) =2441a(10) =2949a(11) =3505a(12) =4109a(13) =4761a(14) =5461a(15) =6209a(16) =7005a(17) =7849a(18) =8741a(19) =9681a(20) =10669a(21) =11705a(22) =12789a(23) =13921a(24) =15101a(25) =16329a(26) =17605a(27) =18929a(28) =20301a(29) =21721