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

Terms

a(0) =5a(1) =7a(2) =17a(3) =71a(4) =257a(5) =487a(6) =761a(7) =1151a(8) =4327a(9) =18287a(10) =52721a(11) =65537a(12) =150767a(13) =221471a(14) =446597a(15) =830861a(16) =1002467a(17) =2202787a(18) =4978367a(19) =6088337a(20) =7534511a(21) =9887651a(22) =14278391a(23) =21453101a(24) =25032437a(25) =31176863a(26) =47290697a(27) =51182837a(28) =54264257a(29) =80228717