Numbers k such that phi(k) is a perfect 5th power.

Terms

a(0) =1a(1) =2a(2) =51a(3) =64a(4) =68a(5) =80a(6) =96a(7) =102a(8) =120a(9) =1285a(10) =2048a(11) =2056a(12) =2176a(13) =2560a(14) =2570a(15) =2720a(16) =3072a(17) =3084a(18) =3264a(19) =3840a(20) =4080a(21) =7957a(22) =8227a(23) =8279a(24) =9079a(25) =9139a(26) =9709a(27) =9919a(28) =10355a(29) =10595