Ke2⁢m+1⁡(z,h)=∑ℓ=0∞B2⁢ℓ+12⁢m+1⁡(h2)B2⁢s+12⁢m+1⁡(h2)⁢(Iℓ-s⁡(h⁢ⅇ-z)⁢Kℓ+s+1⁡(h⁢ⅇz)-Iℓ+s+1⁡(h⁢ⅇ-z)⁢Kℓ-s⁡(h⁢ⅇz)),