Determine all integers n > 1 such that

(2^n) + 1/n^2

is an integer.

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- Oct 2nd 2012, 02:14 AMgeniusgarvilsimple but hard
Determine all integers n > 1 such that

(2^n) + 1/n^2

is an integer. - Oct 2nd 2012, 02:26 AMgrillageRe: simple but hard
The way you have written it seems a little unclear. Do you mean $\displaystyle \frac{\left ( 2^{n}+1 \right )}{n^{2}}$

- Oct 3rd 2012, 01:34 AMgeniusgarvilRe: simple but hard
yes that one.