Primes of the form 40*R_k + 3, where R_k is the repunit (A002275) of length k.
A093163
Primes of the form 40*R_k + 3, where R_k is the repunit (A002275) of length k.
Terms
- a(0) =3a(1) =43a(2) =443a(3) =444443a(4) =444444443a(5) =444444444443
External references
- oeis: A093163