Squares of powerful numbers that are not prime powers.

Terms

a(0) =1296a(1) =5184a(2) =10000a(3) =11664a(4) =20736a(5) =38416a(6) =40000a(7) =46656a(8) =50625a(9) =82944a(10) =104976a(11) =153664a(12) =160000a(13) =186624a(14) =194481a(15) =234256a(16) =250000a(17) =331776a(18) =419904a(19) =455625a(20) =456976a(21) =614656a(22) =640000a(23) =746496a(24) =810000a(25) =937024a(26) =944784a(27) =1000000a(28) =1185921a(29) =1265625