a(n) = (9*n + 2)^3.

Terms

a(0) =8a(1) =1331a(2) =8000a(3) =24389a(4) =54872a(5) =103823a(6) =175616a(7) =274625a(8) =405224a(9) =571787a(10) =778688a(11) =1030301a(12) =1331000a(13) =1685159a(14) =2097152a(15) =2571353a(16) =3112136a(17) =3723875a(18) =4410944a(19) =5177717a(20) =6028568a(21) =6967871a(22) =8000000a(23) =9129329