Smallest solution to GCD(x,A004086(x))=7^n.

A072050

Smallest solution to GCD(x,A004086(x))=7^n.

Terms

    a(0) =7a(1) =18718a(2) =343a(3) =125204947a(4) =231012215a(5) =11298657013a(6) =211066659013

External references