a(n) = (12*n + 7)^3.

Terms

a(0) =343a(1) =6859a(2) =29791a(3) =79507a(4) =166375a(5) =300763a(6) =493039a(7) =753571a(8) =1092727a(9) =1520875a(10) =2048383a(11) =2685619a(12) =3442951a(13) =4330747a(14) =5359375a(15) =6539203a(16) =7880599a(17) =9393931a(18) =11089567a(19) =12977875a(20) =15069223a(21) =17373979a(22) =19902511a(23) =22665187a(24) =25672375a(25) =28934443a(26) =32461759a(27) =36264691a(28) =40353607a(29) =44738875