a(n) = n^3 + 4.

Terms

a(0) =4a(1) =5a(2) =12a(3) =31a(4) =68a(5) =129a(6) =220a(7) =347a(8) =516a(9) =733a(10) =1004a(11) =1335a(12) =1732a(13) =2201a(14) =2748a(15) =3379a(16) =4100a(17) =4917a(18) =5836a(19) =6863a(20) =8004a(21) =9265a(22) =10652a(23) =12171a(24) =13828a(25) =15629a(26) =17580a(27) =19687a(28) =21956a(29) =24393