∫0∞ⅇ-a⁢x⁢Hen⁡(x)⁢xz-1⁢ⅆ⁡x=Γ⁡(z+n)⁢a-n-2⁢F22⁡(-12⁢n,-12⁢n+12-12⁢z-12⁢n,-12⁢z-12⁢n+12;-12⁢a2),