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A115051
as a simple table
n
a(n)
2
1
3
1
4
1
5
3
6
4
7
5
8
4
9
4
10
6
11
15
12
4
13
9
14
3
15
8
16
22
17
42
18
61
[1,1,1,3,4,5,4,4,6,15,4,9,3,8,22,42,61]