Smallest square k^2 == 1 (mod 10^n) where k > 1.

A085877

Smallest square k^2 == 1 (mod 10^n) where k > 1.

Terms

    a(0) =81a(1) =2401a(2) =62001a(3) =1560001a(4) =351600001a(5) =47852000001a(6) =610350000001

External references