Smallest semiprime containing leading sequence of n ascending numbers.

A178928

Smallest semiprime containing leading sequence of n ascending numbers.

Terms

    a(0) =10a(1) =121a(2) =123a(3) =1234a(4) =123451a(5) =1234561a(6) =1234567a(7) =123456782a(8) =12345678911a(9) =123456789101

External references