Smallest nontrivial extension of n which is a cube.

Terms

a(0) =125a(1) =27a(2) =343a(3) =4096a(4) =512a(5) =64a(6) =729a(7) =8000a(8) =9261a(9) =1000a(10) =110592a(11) =125a(12) =1331a(13) =140608a(14) =15625a(15) =166375a(16) =1728a(17) =185193a(18) =19683a(19) =205379a(20) =216a(21) =226981a(22) =238328a(23) =24389a(24) =250047a(25) =262144a(26) =2744a(27) =287496a(28) =29791a(29) =300763