Nørlund Polynomials $B_n^s(0) $ are defined as $B_n^s(0)= \lim\limits_{t \rightarrow 0} \frac {d^n}{dt^n} \left ( \frac {t}{e^t-1} \right) ^s$
For $s=1$, $B_n^s(0)= 2\pi \int_{-\infty}^{\infty} \frac {(-\frac {1}{2}+it) ^n}{(e^{\pi t}+e^{-\pi t})^2}dt $
Is there some integral representation of Nørlund Polynomials for any $s $? It is important for me to save form $B_n^s(0)= \int_{-\infty}^{\infty} (-\frac {1}{2}+it) ^n ×f (s)dt $