\begin{Bmatrix} | ! style="text-align:left;"| B_{0}(z)=1\\ B_{1}(z)=z-1\\ B_{2}(z)=2z^2-3z+1\\ etc.\\ \end{Bmatrix} and generally [math]B_{k}(z)=\sum_{h=0}^{k}b_{k, h}z^{k}[/math]
