Smallest semiprime containing exactly n 5's.

A104724

Smallest semiprime containing exactly n 5's.

Terms

    a(0) =15a(1) =55a(2) =1555a(3) =50555a(4) =505555a(5) =1555555a(6) =55255555a(7) =355555555a(8) =5155555555a(9) =52555555555a(10) =155555555555

External references