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A002563
as a simple table
n
a(n)
1
1
2
1
3
1
4
3
5
37
6
1
7
13
8
638
9
21
10
1
11
1
12
1
13
41
14
588
15
25872
16
43
17
22
18
2
[1,1,1,3,37,1,13,638,21,1,1,1,41,588,25872,43,22, 2]