Find the next number in the sequence:
2, 4, 6, 12, 24, 60, 120 ...
I believe I know the next three but there seems to be a big gap later on so I'm doubtful whether 840 really is on it. And is there really nothing between 2520 and 27720 (assuming these are on it)? Research continues.
A slightly easier related (provably expanded?) sequence goes:
2, 4, 6, 8, 10, 12, 18, 20, 24, 30 ...
Edit: Discovered an error in the top sequence. To be updated later.
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