Numbers k such that phi(tau(k)) = rad(k).

Terms

a(0) =1a(1) =4a(2) =8a(3) =32a(4) =36a(5) =192a(6) =288a(7) =768a(8) =972a(9) =1458a(10) =5120a(11) =13122a(12) =326592a(13) =19531250a(14) =22588608a(15) =46137344a(16) =171532242a(17) =110000000000