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A005864
as a simple table
n
a(n)
1
1
2
1
3
1
4
2
5
2
6
4
7
8
8
16
9
20
10
40
11
72
12
144
13
256
14
512
15
1024
16
2048
[1,1,1,2,2,4,8,16,20,40,72,144,256,512,1024,2048]