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A147449
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
7
16
7
17
13
18
13
19
39
20
39
21
123
22
123
23
461
24
461
25
2371
26
2371
[1,1,1,1,1,1,1,1,1,1,1,1,3,3,7,7,13,13,39,39,123, 123,461,461,2371,2371]