build_G                 Build a generator matrix for theorem-based
                        row-column designs
eval_2fi_from_design    Evaluate unconfounded main effects and
                        two-factor interactions
generate_2fi_optimal_rowcol
                        Generate a 2FI-optimal row-column factorial
                        design
generate_2fi_rowcol     Generate a row-column design for main effects
                        and two-factor interactions
generate_row_column_design
                        Generate the row-column treatment layout from a
                        generator matrix
search_2fi_optimal_G_k23
                        Search for prime-level generator matrices for k
                        = 2 or k = 3
