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A005859
as a simple table
n
a(n)
9
1
10
1
11
1
12
1
13
1
14
1
15
2
16
2
17
2
18
4
19
4
20
5
21
7
22
8
23
10
24
16
25
25
[1,1,1,1,1,1,2,2,2,4,4,5,7,8,10,16,25]