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
In the shortcut collatz function
$$
T(x) =
\begin{cases}
\frac{x}{2} & \text{if } x \equiv 0 \pmod{2} \\[2ex]
\frac{3x + 1}{2} & \text{if } x \equiv 1 \pmod{2}
\end{cases}
$$
The dropping time of $n$ is the number of steps it takes for $n$ to reach a value smaller than the initial seed.
That woul...