What will come in place of the question mark (?) in the following number series ?
The pattern here followed is :Â
12 + $$1^3$$ = 13
13 +Â $$2^3$$ =Â 21
21 +Â $$4^3$$ =Â 85
85 +Â $$8^3$$ =Â 597
597 +Â $$16^3$$ =Â 4693
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