Powers k^m, even m >= 4, where k is composite and squarefree.

Terms

a(0) =1296a(1) =10000a(2) =38416a(3) =46656a(4) =50625a(5) =194481a(6) =234256a(7) =456976a(8) =810000a(9) =1000000a(10) =1185921a(11) =1336336a(12) =1500625a(13) =1679616a(14) =2085136a(15) =2313441a(16) =3111696a(17) =4477456a(18) =6765201a(19) =7529536a(20) =9150625a(21) =10556001a(22) =11316496a(23) =11390625a(24) =14776336a(25) =17850625a(26) =18974736a(27) =22667121a(28) =24010000a(29) =29986576