\begin{definition}[Definition:Fourth Power]
A '''fourth power''' is an integer which can be expressed as the $4$th power of an integer.
The sequence of fourth powers begins:
:$1, 16, 81, 256, 625, 1296, 2401, 4096, 6561, 10 \, 000, 14 \, 641, \ldots$
{{OEIS|A000583}}
\end{definition}