| $a_{11} = \frac{(1+1)^2}{2} = \frac{4}{2} = 2$ | $a_{12} = \frac{(1+2)^2}{2} = \frac{9}{2}$ |
| $a_{21} = \frac{(2+1)^2}{2} = \frac{9}{2}$ | $a_{22} = \frac{(2+2)^2}{2} = \frac{16}{2} = 8$ |
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