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A147510
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
23
18
23
19
81
20
81
21
267
22
267
23
1053
24
1053
25
6173
26
6173
[1,1,1,1,1,1,1,1,1,1,1,1,3,3,9,9,23,23,81,81,267, 267,1053,1053,6173,6173]