Ln⁡G⁡(z+1)∼14⁢z2+z⁢Γ⁡(z+1)-(12⁢z⁢(z+1)+112)⁢Ln⁡z-ln⁡A+∑k=1∞B2⁢k+22⁢k⁢(2⁢k+1)⁢(2⁢k+2)⁢z2⁢k;