Numbers k such that phi(x) = k has exactly 11 solutions.

Terms

a(0) =48a(1) =512a(2) =540a(3) =1000a(4) =1836a(5) =2136a(6) =2176a(7) =2320a(8) =2340a(9) =3216a(10) =3648a(11) =3936a(12) =4284a(13) =4352a(14) =4356a(15) =4784a(16) =5088a(17) =5640a(18) =5936a(19) =6216a(20) =6576a(21) =6816a(22) =7120a(23) =7224a(24) =7280a(25) =7752a(26) =8100a(27) =8184a(28) =8496a(29) =8520