序号

n

1

0

15%

3×13

0

2

2.4%

11.5%

3×13

0.4%

3

7.2%

4.6%

3×3

2.3%

4~6

5.7%

9.2%

3×10

1.0%

7~9

6.9%

6.9%

3×7

1.5%

10~18

6.3%

8.5%

3×9

1.2%

19~27

6.5%

7.7%

3×8

1.3%