Values not in range of Euler phi function.

Terms

a(0) =3a(1) =5a(2) =7a(3) =9a(4) =11a(5) =13a(6) =14a(7) =15a(8) =17a(9) =19a(10) =21a(11) =23a(12) =25a(13) =26a(14) =27a(15) =29a(16) =31a(17) =33a(18) =34a(19) =35a(20) =37a(21) =38a(22) =39a(23) =41a(24) =43a(25) =45a(26) =47a(27) =49a(28) =50a(29) =51