Ordered union of the sets {h^6, h >=1} and {3*k^6, k >=1}.

Terms

a(0) =1a(1) =3a(2) =64a(3) =192a(4) =729a(5) =2187a(6) =4096a(7) =12288a(8) =15625a(9) =46656a(10) =46875a(11) =117649a(12) =139968a(13) =262144a(14) =352947a(15) =531441a(16) =786432a(17) =1000000a(18) =1594323a(19) =1771561a(20) =2985984a(21) =3000000a(22) =4826809a(23) =5314683a(24) =7529536a(25) =8957952a(26) =11390625a(27) =14480427a(28) =16777216a(29) =22588608