What will come in place of the question mark (?) in each of the following number series ?
The pattern here followed is :
2 $$\times 1 + 1^2$$ = 3
3 $$\times 3 + 3^2$$ = 18
18 $$\times 5 + 5^2$$ = 115
115 $$\times 7 + 7^2$$ = 854
854 $$\times 9 + 9^2$$ = 7767
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