w⁡(n)∼π⁢ⅇ12⁢z⁢z14⁢(4⁢a-2⁢b+1)Γ⁡(a)⁢Γ⁡(a+1-b)⁢n14⁢(4⁢a-2⁢b-3)⁢ⅇ-2⁢n⁢z,