Department of Physics, Yancheng Teachers College, Yancheng 224002,China;
Department of Physics, Yancheng Teachers College, Yancheng 224002,China;
Department of Physics, Yancheng Teachers College, Yancheng 224002,China;
Department of Physics, Yancheng Teachers College, Yancheng 224002,China;
Explicit expressions; Recurrence formulas; Radial average value; N-dimensional hydrogen atom;