If you prefer Maeder's numbering, you can use UniformPolyhedron[{"Uniform", 30}]
UniformPolyhedron[{"Uniform", 30}]
Thanx
Export["u30.stl", UniformPolyhedron[30]]
Export::type: UniformPolyhedron cannot be exported to the STL format.
Nevermind.
Export["u70.stl", UniformPolyhedron[70]]