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A171514
as a simple table
n
a(n)
1
1
2
3
3
6
4
9
5
13
6
17
7
29
8
63
9
90
10
531
11
14286
12
30617
13
37815
[1,3,6,9,13,17,29,63,90,531,14286,30617,37815]