Primes of the form 70*R_k + 3, where R_k is the repunit (A002275) of length k.
A093165
Primes of the form 70*R_k + 3, where R_k is the repunit (A002275) of length k.
Terms
- a(0) =3a(1) =73a(2) =773a(3) =77773a(4) =777777773a(5) =777777777773
External references
- oeis: A093165