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A105734
as a simple table
n
a(n)
1
1
2
1
3
2
4
3
5
2
6
1
7
1
8
2
9
3
10
2
11
1
12
1
13
2
14
3
15
2
16
1
17
1
18
2
19
3
20
2
21
1
22
1
[1,1,2,3,2,1,1,2,3,2,1,1,2,3,2,1,1,2,3,2,1,1]