7-automorphic numbers ending in 3: final digits of 7n^2 agree with n.

A030990

7-automorphic numbers ending in 3: final digits of 7n^2 agree with n.

Terms

    a(0) =3a(1) =43a(2) =143a(3) =7143a(4) =57143a(5) =857143a(6) =2857143a(7) =42857143a(8) =142857143a(9) =7142857143a(10) =57142857143a(11) =857142857143

External references