Squares composed of digits {1,2,9}.

A053889

Squares composed of digits {1,2,9}.

Terms

    a(0) =1a(1) =9a(2) =121a(3) =29929a(4) =9991921a(5) =1212919929a(6) =1929229929a(7) =1991212129a(8) =2929299129

External references