[tex]\bf \begin{array}{ccll}
n&term&value\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1&A(1)&-2(2)^{1-1}\\
&&-2(2)^0\\
&&-2\\\\
4&A(4)&-2(2)^{4-1}\\
&&-2(2)^3\\
&&-16\\\\
8&A(8)&-2(2)^{8-1}\\
&&-2(2)^7\\
&&-256
\end{array}[/tex]
