Smallest nonempty set S containing prime divisors of 9k+1 for each k in S.

A020623

Smallest nonempty set S containing prime divisors of 9k+1 for each k in S.

Terms

    a(0) =2a(1) =7a(2) =13a(3) =19a(4) =23a(5) =43a(6) =59a(7) =97

External references