Primes p such that gcd(phi(p-1), sigma(p-1)) = 1 with phi = A000010, sigma = A000203.

Terms

a(0) =2a(1) =3a(2) =5a(3) =17a(4) =37a(5) =101a(6) =257a(7) =401a(8) =577a(9) =1297a(10) =1601a(11) =2917a(12) =4357a(13) =8101a(14) =8837a(15) =12101a(16) =13457a(17) =14401a(18) =22501a(19) =25601a(20) =28901a(21) =30977a(22) =32401a(23) =33857a(24) =41617a(25) =52901a(26) =55697a(27) =57601a(28) =62501a(29) =65537