Odd n such that 2*phi(n) < n, but there does not exist an even k < n with phi(k) = phi(n).

Terms

a(0) =9075a(1) =11985a(2) =19965a(3) =21165a(4) =22515a(5) =22815a(6) =34935a(7) =35445a(8) =44505a(9) =45315a(10) =59415a(11) =67431a(12) =67545a(13) =108927a(14) =135945a(15) =143451a(16) =180999a(17) =286425a(18) =295659a(19) =359499a(20) =360315a(21) =372945a(22) =449445a(23) =463845a(24) =521157a(25) =563295a(26) =576045a(27) =606879a(28) =607905a(29) =684411