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A088649
as a simple table
n
a(n)
1
1
2
3
3
7
4
9
5
13
6
19
7
21
8
27
9
31
10
33
11
37
12
43
13
49
14
51
15
57
16
63
17
69
18
73
19
79
20
87
21
91
22
97
23
99
24
103
[1,3,7,9,13,19,21,27,31,33,37,43,49,51,57,63,69, 73,79,87,91,97,99,103]