What will come in place of the question mark (?) in the following number series?
Numbers are multiplied by successive natural numbers and then 7 is added
2 $$\times 1 + 7$$ = 9
9Â $$\times 2 + 7$$ =Â 25
25Â $$\times 3 + 7$$ =Â 82
82Â $$\times 4 + 7$$ =Â 335
335Â $$\times 5 + 7$$ =Â 1682
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