The numbers above the line and below the line have a specific property to them:
\begin{array}{c} 1\ 3\ 5\ 6\ 7\ 9\ 10\ 11\ 12\ 13\ \ldots \\ \hline 2\ 4\ 8\ 15\ 16\ 21\ 30\ 32\ 33\ \ldots & \end{array}
Every natural number has a place either above or below the line.
What is this property? What are the next three numbers on each line? Would the numbers 29, 52, and 138 go above or below the line?