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Find the next number in this unusual sequence. 

2, 3, 7, 25, 121, 721, 5041, 40321, ...

 Apr 1, 2019
 #1
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+1

1! + 1, 2! + 1, 3! + 1, 4! + 1, 5! + 1, 6! + 1, 7! + 1, 8! + 1, 9! +1, 10! +1..........etc.

 Apr 1, 2019
 #3
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thank you!

Guest Apr 2, 2019
 #2
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what kind of a sequence is this?

 Apr 1, 2019

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