Numbers k such that phi(x) = k has exactly 5 solutions.

Terms

a(0) =8a(1) =20a(2) =220a(3) =272a(4) =300a(5) =368a(6) =416a(7) =456a(8) =500a(9) =656a(10) =732a(11) =848a(12) =876a(13) =1092a(14) =1160a(15) =1212a(16) =1236a(17) =1328a(18) =1376a(19) =1424a(20) =1568a(21) =1624a(22) =1716a(23) =1808a(24) =2144a(25) =2244a(26) =2336a(27) =2420a(28) =2460a(29) =2480