Numbers n such that 3*10^n + R_n + 8 is prime, where R_n = 11...1 is the repunit (A002275) of length n.
A102965
Numbers n such that 3*10^n + R_n + 8 is prime, where R_n = 11...1 is the repunit (A002275) of length n.
Terms
- a(0) =0a(1) =3a(2) =143a(3) =797a(4) =3143a(5) =18791a(6) =20763a(7) =96743
External references
- oeis: A102965