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Problems
Contests
National and Regional Contests
PEN Problems
PEN A Problems
71
71
Part of
PEN A Problems
Problems
(1)
A 71
Source:
5/25/2007
Determine all integers
n
>
1
n > 1
n
>
1
such that
2
n
+
1
n
2
\frac{2^{n}+1}{n^{2}}
n
2
2
n
+
1
is an integer.
function
Divisibility Theory