Where's the setup

Geometry Level 3

The number of triangles that can be formed with the sides of lengths $a,b$ and $c$ where $a,b,c$ are integers such that $a <b<c \leq C$ , when $C$ is odd, is:

(C-3)(C-5)/4 (C-3)^2/4 (C-1)(C-5)/4 (C-1)(C-3)/4