Primes of the form 10*R_k + 3, where R_k is the repunit (A002275) of length k.
A093011
Primes of the form 10*R_k + 3, where R_k is the repunit (A002275) of length k.
Terms
- a(0) =3a(1) =13a(2) =113a(3) =11113a(4) =111111113a(5) =11111111113
External references
- oeis: A093011