2. CONSTRUCTING AND ENUMERATING FRANKLIN SQUARES. In this section we describe an algebraic technique for constructing and enumerating Franklin squares and prove Theorems 1.2 and 1.3. For these purposes we regard n x n Franklin squares (where n = 8 or n. = 16) as either n x n matrices or vectors in R" and ap¬ply the normal algebraic operations to them. We also consider the entries of an n x n Franklin square as variables y,j (1