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A146394
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
1
10
1
11
3
12
3
13
9
14
9
15
23
16
23
17
77
18
77
19
415
20
415
21
2809
22
2809
23
21039
24
21039
[1,1,1,1,1,1,1,1,1,1,3,3,9,9,23,23,77,77,415,415, 2809,2809,21039,21039]