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A005851
as a simple table
n
a(n)
5
1
6
1
7
1
8
1
9
2
10
2
11
2
12
3
13
3
14
4
15
6
16
6
17
7
18
9
19
12
20
16
21
21
22
21
23
23
24
24
25
30
26
30
[1,1,1,1,2,2,2,3,3,4,6,6,7,9,12,16,21,21,23,24,30, 30]