Floor [sqrt{concatenation of first n squares}].

A067124

Floor [sqrt{concatenation of first n squares}].

Terms

    a(0) =1a(1) =3a(2) =12a(3) =122a(4) =1221a(5) =12213a(6) =122132a(7) =1221321a(8) =12213211a(9) =386215660a(10) =12213211555a(11) =386215660604

External references