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What is the sum of all positive integers $n$ for which $2^n + 65$ is a perfect square?

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    Sum of all values of n that satisfy that condition2011-03-13
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    Thanks, I realized what you meant and deleted my comment.2011-03-13
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    Aargh, just realized tom hasn't been here in about 10 months. I have to remember to check these things *before* I post....2012-01-22

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