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A037290
as a simple table
n
a(n)
1
1
2
2
3
2
4
9
5
2
6
4
7
2
8
40
9
9
10
4
11
2
12
18
13
2
14
4
15
4
16
242
17
2
18
18
19
2
20
18
21
4
22
4
23
2
24
80
25
9
26
4
27
47
28
18
29
2
30
8
31
2
[1,2,2,9,2,4,2,40,9,4,2,18,2,4,4,242,2,18,2,18,4, 4,2,80,9,4,47,18,2,8,2]