Primes p such that phi(phi(p-1)+1) = phi(phi(p-2)+1).

Terms

a(0) =3a(1) =5a(2) =17a(3) =53a(4) =83a(5) =257a(6) =701a(7) =977a(8) =1877a(9) =2027a(10) =2837a(11) =3257a(12) =5189a(13) =6521a(14) =9257a(15) =11717a(16) =13367a(17) =13457a(18) =18947a(19) =22937a(20) =27611a(21) =56813a(22) =65537a(23) =81509a(24) =137363a(25) =157037a(26) =277643a(27) =307397a(28) =491537a(29) =589409