Smallest k such that phi(x) = k has exactly n odd solutions.

Terms

a(0) =1a(1) =6a(2) =24a(3) =60a(4) =144a(5) =72a(6) =216a(7) =480a(8) =600a(9) =240a(10) =432a(11) =1152a(12) =1296a(13) =1080a(14) =4608a(15) =2016a(16) =720a(17) =2520a(18) =2400a(19) =1440a(20) =5184a(21) =4032a(22) =2880a(23) =5280a(24) =7776a(25) =2160a(26) =5760a(27) =21840a(28) =7560a(29) =9600