Highly cototient numbers that are prime, or intersection of A000040 and A100827.

Terms

a(0) =2a(1) =23a(2) =47a(3) =59a(4) =83a(5) =89a(6) =113a(7) =167a(8) =269a(9) =389a(10) =419a(11) =509a(12) =659a(13) =839a(14) =1049a(15) =1259a(16) =1889a(17) =2099a(18) =2309a(19) =2729a(20) =3359a(21) =3989a(22) =4289a(23) =4409a(24) =5879a(25) =6089a(26) =6719a(27) =9029a(28) =9239a(29) =10289