Primes of the form 9*2^n+1.A050528Primes of the form 9*2^n+1.Terms a(0) =19a(1) =37a(2) =73a(3) =577a(4) =1153a(5) =18433a(6) =147457a(7) =1179649a(8) =77309411329External referencesoeis: A050528