Mκ,μ⁡(x)∼Γ⁡(1+2⁢μ)Γ⁡(12+μ-κ)⁢ⅇ12⁢x⁢x-κ⁢∑s=0∞(12-μ+κ)s⁢(12+μ+κ)ss!⁢x-s,