一个数学问题[1.5小时内加赏20分]

1~75
3.14
6.28
9.42
12.56
15.7
18.84
21.98
25.12
28.26
31.4
34.54
37.68
40.82
43.96
47.1
50.24
53.38
56.52
59.66
62.8
65.94
69.08
72.22
75.36
78.5
81.64
84.78
87.92
91.06
94.2
97.34
100.48
103.62
106.76
109.9
113.04
116.18
119.32
122.46
125.6
128.74
131.88
135.02
138.16
141.3
144.44
147.58
150.72
153.86
157
160.14
163.28
166.42
169.56
172.7
175.84
178.98
182.12
185.26
188.4
191.54
194.68
197.82
200.96
204.1
207.24
210.38
213.52
216.66
219.8
222.94
226.08

3.14
6.28
9.42
12.56
15.7
18.84
21.98
25.12
28.26
31.4