Numbers n such that tau(phi(n)) = sigma(rad(n)).

Terms

a(0) =1a(1) =8a(2) =9a(3) =25a(4) =49a(5) =216a(6) =288a(7) =324a(8) =675a(9) =1125a(10) =1331a(11) =1458a(12) =1568a(13) =2000a(14) =2744a(15) =3200a(16) =3645a(17) =6125a(18) =6144a(19) =8575a(20) =9604a(21) =9801a(22) =14336a(23) =30976a(24) =31250a(25) =42592a(26) =46875a(27) =70304a(28) =72171a(29) =81000