Number Series Puzzle – Find the next number in the sequence

Number Series puzzle

Improve your logical and reasoning skill using the number puzzles. In the above puzzle, one number is missing. Can you tell which number it is

The missing number is 17
The sequence is a alternative of below two series
First Series – 2,2^2+1,2^3+1,2^4+1
Second Series – 3,3^2-1, 3^3-1, 3^4-1

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