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A140720
as a simple table
n
a(n)
1
1
2
2
3
1
4
3
5
2
6
2
7
2
8
2
9
5
10
1
11
3
12
2
13
2
14
4
15
2
16
3
17
3
18
4
19
2
20
3
21
2
22
3
23
3
24
4
25
2
26
3
27
3
28
3
[1,2,1,3,2,2,2,2,5,1,3,2,2,4,2,3,3,4,2,3,2,3,3,4, 2,3,3,3]