a(1) = 1; thereafter a(n) = the smallest prime of the form d0...0a(n-1), where d is a single digit, or 0 if no such prime exists.

A077714

a(1) = 1; thereafter a(n) = the smallest prime of the form d0...0a(n-1), where d is a single digit, or 0 if no such prime exists.

Terms

    a(0) =1a(1) =11a(2) =211a(3) =4211a(4) =34211a(5) =234211a(6) =4234211a(7) =304234211a(8) =9304234211a(9) =209304234211

External references