Find the missing number_2

Number Theory Level pending

2, 4, 9, 28, 125, _ _ _ __


The answer is 726.

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1 solution

Manish Dash
Mar 18, 2015

1! + 1 = 2 , 2! + 2 = 4 , 3! + 3 = 9 , 4! + 4 =28 , 5! + 5 = 125 , 6! + 6 = 726

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