Find out the wrong number from the following number series ?

Question

5, 7, 16, 57, 244, 1245, 7506

[A] 244

[B] 57

[C] 7

[D] 5

Answer & Explanation
Option: [C]

The wrong number from the given series is 7. It is replaced by 6

5 x 1 + 1² = 6

6 x 2 + 2² = 16

16 x 3 + 3² = 57

57 x 4 + 4² = 244

244 x 5 + 5² = 1245

1245 x 6 + 6² = 7506