a(n) = (11*n + 9)^3.

Terms

a(0) =729a(1) =8000a(2) =29791a(3) =74088a(4) =148877a(5) =262144a(6) =421875a(7) =636056a(8) =912673a(9) =1259712a(10) =1685159a(11) =2197000a(12) =2803221a(13) =3511808a(14) =4330747a(15) =5268024a(16) =6331625a(17) =7529536a(18) =8869743a(19) =10360232a(20) =12008989a(21) =13824000a(22) =15813251a(23) =17984728a(24) =20346417a(25) =22906304a(26) =25672375a(27) =28652616a(28) =31855013