a(1) = 17, a(n) is the smallest prime obtained by inserting digits between every pair of digits of a(n-1).

A080441

a(1) = 17, a(n) is the smallest prime obtained by inserting digits between every pair of digits of a(n-1).

Terms

    a(0) =17a(1) =107a(2) =10007a(3) =100000007

External references