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Tong Lingling's user avatar
Tong Lingling's user avatar
Tong Lingling's user avatar
Tong Lingling
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20
Where did this Pólya's theorem appear?
13
Six consecutive positive integers with certain shape
10
An identity related to sum of two squares
9
Binomial coefficients sum $\sum_{k=1}^{n} \frac{1}{k}\binom{2k}{k}$ when $n>1$, $p=2n+1$ is a prime
6
Six consecutive positive integers with certain shape