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10 cards from this deck
n(n+1)2\frac{n(n+1)}{2}2n(n+1)
n(n+1)(2n+1)6\frac{n(n+1)(2n+1)}{6}6n(n+1)(2n+1)
[n(n+1)2]2\left[\frac{n(n+1)}{2}\right]^2[2n(n+1)]2
∑ar+∑br\sum a_r + \sum b_r∑ar+∑br
c∑arc \sum a_rc∑ar
[∑r=1nr]2\left[\sum_{r=1}^n r\right]^2[∑r=1nr]2 or [n(n+1)2]2\left[\frac{n(n+1)}{2}\right]^2[2n(n+1)]2
385385385
363636
225225225
Coefficients
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