_{n}\right\vert \leq \frac{\prod\limits_{k=0}^{n}\left[ k-0+\frac{0\left( \beta -\delta \right) }{\pi }\sin \frac{\pi \left( 0-\delta \right) }{\beta -\delta }\right] }{\left( n-0\right) !}\qquad \left( n=0,0,\ldots \right) .