a(1) = 4, a(n)= smallest n-th power obtained by inserting digits anywhere in a(n-1).

A080808

a(1) = 4, a(n)= smallest n-th power obtained by inserting digits anywhere in a(n-1).

Terms

    a(0) =4a(1) =49a(2) =4096a(3) =3748096

External references