Primes of the form 2^r * 17^s + 1.

Terms

a(0) =2a(1) =3a(2) =5a(3) =17a(4) =137a(5) =257a(6) =65537a(7) =157217a(8) =295937a(9) =557057a(10) =1336337a(11) =96550277a(12) =1212153857a(13) =2281701377a(14) =5473632257a(15) =395469930497