<image>To form one triangle using matchsticks, you need 3 matchsticks. To form two connected triangles, you need 5 matchsticks. To form three connected triangles, you need 7 matchsticks (as shown in the figure). If you want to form m connected triangles, you will need ______ matchsticks; if you have n matchsticks (where n is an odd number greater than 3), you can form ______ such connected triangles.
