| 1 |
| (2n-1)(2n+1) |
| 1 |
| 2 |
| 1 |
| 2n-1 |
| 1 |
| 2n+1 |
∴S=
| 1 |
| 1×3 |
| 1 |
| 3×5 |
| 1 |
| (2n-1)(2n+1) |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 2n-1 |
| 1 |
| 2n+1 |
| 1 |
| 2 |
| 1 |
| 2n+1 |
∴S=
| n |
| 2n+1 |
故答案为：
| n |
| 2n+1 |
| 1 |
| 1×3 |
| 1 |
| 3×5 |
| 1 |
| (2n-1)(2n+1) |
| 1 |
| (2n-1)(2n+1) |
| 1 |
| 2 |
| 1 |
| 2n-1 |
| 1 |
| 2n+1 |
| 1 |
| 1×3 |
| 1 |
| 3×5 |
| 1 |
| (2n-1)(2n+1) |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 2n-1 |
| 1 |
| 2n+1 |
| 1 |
| 2 |
| 1 |
| 2n+1 |
| n |
| 2n+1 |
| n |
| 2n+1 |