型的框图,且框图中五个小正方形与月历表中每个小正方形大小相同.观察并思考下列问题:
型框图中5个数有什么规律?并说明理由.

| 1 |
| 1-a |
| 1 |
| 1-2 |
| 1 |
| -1 |
| 1 |
| 1-(-1) |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 2 |
| 3 |
| 3 |
| 4 |
| n |
| n+1 |
| 1 |
| n+1 |
| 1 |
| 19 |
| 1 |
| 20 |
| 1 |
| 21 |
| 1 |
| 2011 |
| 1 |
| 2 |
| 1 |
| 2 |
(2006·贺州)观察图中一列有规律的数,然后在“”处填上一个合适的数,这个数是
(2006·常德)如图是一个有规律排列的数表,请用含n的代数式(n为正整数)表示数表中第n行第n列的数:| 9 |
| 5 |
| 16 |
| 12 |
| 25 |
| 21 |
| 36 |
| 32 |
| 36 |
| 32 |
| 49 |
| 45 |
| 64 |
| 60 |