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A137162
as a simple table
n
a(n)
0
3
1
5
2
13
3
15
4
21
5
27
6
31
7
33
8
37
9
45
10
49
11
57
12
61
13
69
14
79
15
81
16
85
17
87
18
93
19
99
20
103
21
105
22
109
23
115
[3,5,13,15,21,27,31,33,37,45,49,57,61,69,79,81,85, 87,93,99,103,105,109,115]