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A003524
as a simple table
n
a(n)
1
1
2
3
3
5
4
7
5
9
6
13
7
15
8
21
9
35
10
39
11
45
12
63
13
65
14
91
15
105
16
117
17
195
18
273
19
315
20
455
21
585
22
819
23
1365
24
4095
[1,3,5,7,9,13,15,21,35,39,45,63,65,91,105,117,195, 273,315,455,585,819,1365,4095]