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\section{Abstract}  A p-rough number for some prime p, is a member of the set of numbers not divisible by any prime $q\section{Introduction}  The 3-rough numbers are simply the odd numbers $1,3,5,7,9,11\cdots$, the numbers which are not divisible by $p\in\{2\}$, See the table below for the appropriate OEIS label.  \begin{equation}  \begin{array}{|c|c|}  \hline  p & \mathrm{OEIS\;ID\;for\;}p\mathrm{-rough\;numbers.} \\  \hline  2 & A000027\\   3 & A005408\\  5 & A007310\\  7 & A007775\\  11 & A008364\\  13 & A008365\\  17 & A008366\\  19 & A166061\\  23 & A166063\\  \hline  \end{array}  \end{equation}