Primes of the form 90*R_k + 1, where R_k is the repunit (A002275) of length k.
A093177
Primes of the form 90*R_k + 1, where R_k is the repunit (A002275) of length k.
Terms
- a(0) =991a(1) =99991a(2) =9999991
External references
- oeis: A093177
A093177
Primes of the form 90*R_k + 1, where R_k is the repunit (A002275) of length k.