Sum up the series!

Probability Level 3

1+13+1336+135369+=Y1 + \frac{1}{3} + \frac{1\cdot 3}{3\cdot 6} + \frac{1\cdot 3\cdot 5}{3\cdot 6\cdot 9} + \cdots = \sqrt{Y}

YY is given as above, find 5Y+1 5Y + 1.

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