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

Terms

a(0) =5a(1) =17a(2) =257a(3) =317a(4) =977a(5) =2237a(6) =3257a(7) =5189a(8) =8537a(9) =9533a(10) =11717a(11) =13367a(12) =22937a(13) =37847a(14) =65537a(15) =76871a(16) =307397a(17) =428957a(18) =491537a(19) =589409a(20) =610913a(21) =983777a(22) =1055063a(23) =1207097a(24) =1340789a(25) =1659587a(26) =2822717a(27) =3137357a(28) =3264887a(29) =3488333