Numbers n such that 6*10^n + R_n + 8 is prime, where R_n = 11...1 is the repunit (A002275) of length n.
A103029
Numbers n such that 6*10^n + R_n + 8 is prime, where R_n = 11...1 is the repunit (A002275) of length n.
Terms
- a(0) =2a(1) =260a(2) =417a(3) =953a(4) =2138a(5) =2969a(6) =3045a(7) =11777a(8) =23648
External references
- oeis: A103029