a(n) = n^3 if n is odd, n^3 + 1 otherwise.

Terms

a(0) =1a(1) =1a(2) =9a(3) =27a(4) =65a(5) =125a(6) =217a(7) =343a(8) =513a(9) =729a(10) =1001a(11) =1331a(12) =1729a(13) =2197a(14) =2745a(15) =3375a(16) =4097a(17) =4913a(18) =5833a(19) =6859a(20) =8001a(21) =9261a(22) =10649a(23) =12167a(24) =13825a(25) =15625a(26) =17577a(27) =19683a(28) =21953a(29) =24389