\[U\left(\tfrac{5}{6},\tfrac{5}{3},\tfrac{4}{3}z^{3/2}\right)=\sqrt{\pi}\frac{3^%
{5/6}\exp\left(\tfrac{2}{3}z^{3/2}\right)}{2^{2/3}z}\operatorname{Ai}\left(z%
\right),\]