Lucky numbers that are pure (perfect) powers with exponent greater than 2.

Terms

a(0) =729a(1) =2187a(2) =29791a(3) =50625a(4) =50653a(5) =83521a(6) =130321a(7) =132651a(8) =166375a(9) =185193a(10) =226981a(11) =300763a(12) =707281a(13) =804357a(14) =823543a(15) =1295029a(16) =1860867a(17) =1874161a(18) =2685619a(19) =3176523a(20) =4782969a(21) =5545233a(22) =5764801a(23) =7189057a(24) =9393931a(25) =12977875a(26) =13845841a(27) =16194277