What will come in place of the question mark (?) in the following number series ?
9, 31, 73, 141, (?)
The pattern followed is :
$$2^3 + 1^2$$ = 9
$$3^3 + 2^2$$ = 31
$$4^3 + 3^2$$ = 73
$$5^3 + 4^2$$ = 141
$$6^3 + 5^2$$ = 241
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