J_{n} (b, u) = {(\frac{u}{2 T})}^{2 n} \frac{Q (b + 2 n, u)}{H (b + 2 n, u)} = {(\frac{- \ln x}{2})}^{2 n} \frac{Q (b + 2 n, u)}{H (b + 2 n, u)}