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赠送一张n=1~50的表,有助于找规律。

Posted by wtl666wtl at 2016-04-07 16:05:51 on Problem 2229 and last updated at 2016-04-07 16:06:25
n  ans
1  1
2  2
3  2
4  4
5  4
6  6
7  6
8  10
9  10
10  14
11  14
12  20
13  20
14  26
15  26
16  36
17  36
18  46
19  46
20  60
21  60
22  74
23  74
24  94
25  94
26  114
27  114
28  140
29  140
30  166
31  166
32  202
33  202
34  238
35  238
36  284
37  284
38  330
39  330
40  390
41  390
42  450
43  450
44  524
45  524
46  598
47  598
48  692
49  692
50  786

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