Primes p such that all prime factors of p-1 have exponent 4.

Terms

a(0) =2a(1) =17a(2) =1297a(3) =1336337a(4) =4477457a(5) =29986577a(6) =45212177a(7) =126247697a(8) =193877777a(9) =406586897a(10) =562448657a(11) =916636177a(12) =1416468497a(13) =1944810001a(14) =3208542737a(15) =4162314257a(16) =5006411537a(17) =5972816657a(18) =12444741137a(19) =19565295377a(20) =34188010001a(21) =38167092497a(22) =47156728337a(23) =59553569297a(24) =61505984017