| 1 |
| an2-1 |
| 1 |
| 2 |
| n2+3n |
| 2 |
| n2+3n |
| 2 |
| 1 |
| n(n+2) |
| 1 |
| 2 |
| 1 |
| n |
| 1 |
| n+2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| n-2 |
| 1 |
| n |
| 1 |
| n-1 |
| 1 |
| n+1 |
| 1 |
| n |
| 1 |
| n+2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| n+1 |
| 1 |
| n+2 |
| 3n2+5n |
| 4(n2+3n+2) |
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