Numbers n such that 55*10^n + 1 is prime.

Terms

a(0) =2a(1) =3a(2) =7a(3) =9a(4) =33a(5) =61a(6) =93a(7) =112a(8) =284a(9) =615a(10) =1293a(11) =2558a(12) =2925a(13) =5961a(14) =6454a(15) =7960a(16) =17521a(17) =40838