Question 1049489: 5,9,13,?,57,157
Answer by ikleyn(52788) (Show Source):
You can put this solution on YOUR website! .
It doesn't seem to be a school math.
It is something different.
It is a puzzle, which is not a school math,
and even is not something adjacent to it.
Find another site for such posts.
I work as a cleaner at this site,
and my task is to support (to keep, to maintain) it in order.
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