a(n) = (10*n + 6)^3.

Terms

a(0) =216a(1) =4096a(2) =17576a(3) =46656a(4) =97336a(5) =175616a(6) =287496a(7) =438976a(8) =636056a(9) =884736a(10) =1191016a(11) =1560896a(12) =2000376a(13) =2515456a(14) =3112136a(15) =3796416a(16) =4574296a(17) =5451776a(18) =6434856a(19) =7529536a(20) =8741816a(21) =10077696a(22) =11543176a(23) =13144256a(24) =14886936a(25) =16777216a(26) =18821096a(27) =21024576a(28) =23393656a(29) =25934336