a(n) = (11*n + 6)^3.

Terms

a(0) =216a(1) =4913a(2) =21952a(3) =59319a(4) =125000a(5) =226981a(6) =373248a(7) =571787a(8) =830584a(9) =1157625a(10) =1560896a(11) =2048383a(12) =2628072a(13) =3307949a(14) =4096000a(15) =5000211a(16) =6028568a(17) =7189057a(18) =8489664a(19) =9938375a(20) =11543176a(21) =13312053a(22) =15252992a(23) =17373979a(24) =19683000a(25) =22188041a(26) =24897088a(27) =27818127a(28) =30959144