a(n) = (7*n + 2)^3.

Terms

a(0) =8a(1) =729a(2) =4096a(3) =12167a(4) =27000a(5) =50653a(6) =85184a(7) =132651a(8) =195112a(9) =274625a(10) =373248a(11) =493039a(12) =636056a(13) =804357a(14) =1000000a(15) =1225043a(16) =1481544a(17) =1771561a(18) =2097152a(19) =2460375a(20) =2863288a(21) =3307949a(22) =3796416a(23) =4330747a(24) =4913000a(25) =5545233a(26) =6229504a(27) =6967871a(28) =7762392a(29) =8615125