Primes of the form 299...977...7 with at least one 9 and one 7.
A283209
Primes of the form 299...977...7 with at least one 9 and one 7.
Terms
- a(0) =299777a(1) =299977a(2) =29999777a(3) =299999977a(4) =2999999777a(5) =299999999777
External references
- oeis: A283209