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A137325
as a simple table
n
a(n)
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
2
10
2
11
2
12
2
13
2
14
2
15
4
16
4
17
4
18
4
19
4
20
4
21
4
22
4
23
4
24
4
25
6
26
6
27
6
28
6
29
6
30
6
31
8
32
8
[2,2,2,2,2,2,2,2,2,2,2,2,2,2,4,4,4,4,4,4,4,4,4,4, 6,6,6,6,6,6,8,8]