a(1) = 1; a(n+1) is next smallest nontrivial square beginning with a(n).

A048557

a(1) = 1; a(n+1) is next smallest nontrivial square beginning with a(n).

Terms

    a(0) =1a(1) =16a(2) =169a(3) =169744a(4) =16974441796

External references