Hard Series

What is the next number in this series?

4,12,84,3612....




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A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
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Amazing Facts

Crossword

The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.