Rn(2)⁡(z)=(-1)n⁢ⅈ⁢ⅇ(μ2-μ1)⁢π⁢ⅈ⁢ⅇλ1⁢z⁢zμ1⁢(C2⁢∑s=0m-1(-1)s⁢as,1⁢Fn+μ1-μ2-s⁡(z⁢ⅇ-π⁢ⅈ)zs+Rm,n(2)⁡(z)),