polygamma5

]> polygamma5

ψ^{(n)} (x) \propto \frac{{(- 1)}^{n - 1} (n - 1)! (n + 2 x)}{2 x^{n + 1}} - {(- 1)}^{n} \sum_{k = 1}^{\infty} \frac{(2 k + n - 1)!}{(2 k)! x^{2 k + n}} B_{2 k}