题目内容
1=
=
=
=
=
=
.
| () |
| 2 |
| 3 |
| () |
| () |
| 4 |
| 9 |
| () |
| () |
| 21 |
| 1000 |
| () |
1=
=
=
=
=
=
.
故答案为:2,3,4,9,21,1000.
| 2 |
| 2 |
| 3 |
| 3 |
| 4 |
| 4 |
| 9 |
| 9 |
| 21 |
| 21 |
| 1000 |
| 1000 |
故答案为:2,3,4,9,21,1000.
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