## Infinite Sum of sinc(n/c)

Hi,
I'm trying to determine the following infinite sum:

$y = \sum_{n=0}^{\infty}\frac{c}{\pi n}sin\left ( \frac{\pi n}{c} \right )$

where c is an arbitrary constant (not necessarily an integer). The summed term is a sinc function of n/c.

Thank you.