SOLUTION: 3, -6, 12, 4, 20, ?

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Question 867268: 3, -6, 12, 4, 20, ?
Found 2 solutions by richwmiller, MathTherapy:
Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
3, -6, 12, 4, 20, 213, 839, 2257, 4929
Answer by MathTherapy(10555)   (Show Source): You can put this solution on YOUR website!

3, -6, 12, 4, 20, ?


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