<image>The original triangle is shown in the figure, as in Figure 1, when there is 1 point inside the original triangle, the original triangle can be divided into 3 triangles;
As in Figure 2, when there are 2 different points inside the original triangle, the original triangle can be divided into 5 triangles;
As in Figure 3, when there are 3 different points inside the original triangle, the original triangle can be divided into 7 triangles;
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And so on, when there are n different points inside the original triangle, the original triangle can be divided into ______ triangles.
