Numbers that have a primitive root (the multiplicative group modulo n is cyclic).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =9a(8) =10a(9) =11a(10) =13a(11) =14a(12) =17a(13) =18a(14) =19a(15) =22a(16) =23a(17) =25a(18) =26a(19) =27a(20) =29a(21) =31a(22) =34a(23) =37a(24) =38a(25) =41a(26) =43a(27) =46a(28) =47a(29) =49