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A147502
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
1
12
1
13
3
14
3
15
9
16
9
17
19
18
19
19
37
20
37
21
159
22
159
23
849
24
849
25
4243
26
4243
[1,1,1,1,1,1,1,1,1,1,1,1,3,3,9,9,19,19,37,37,159, 159,849,849,4243,4243]