Numbers k such that phi(x) = k has exactly 9 solutions.

Terms

a(0) =40a(1) =60a(2) =108a(3) =128a(4) =252a(5) =276a(6) =440a(7) =612a(8) =696a(9) =996a(10) =1088a(11) =1380a(12) =1500a(13) =1824a(14) =1860a(15) =1932a(16) =2064a(17) =2472a(18) =2796a(19) =2928a(20) =3060a(21) =3132a(22) =3384a(23) =3516a(24) =4584a(25) =4932a(26) =5076a(27) =5136a(28) =5436a(29) =5700