If you need an interesting math art 3D model shaped like a sphere, then this 3D model of the Voronoi sphere may serve you.
The 3D model of sphere with Voronoi pattern was generated with the help of Grasshopper plug-in (Rhinoceros software), and then in Blender software wireframe and subdivision modifiers were applied to the thus created 3D model. It took some tweaking of the modifier parameters, but that was actually the most interesting part in the modeling process. If you take a look at the picture, you will see that we have obtained a sphere on which every surface of the Voronoi cell is actually a hole, and every edge of the Voronoi cell has been given thickness.