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A128700
as a simple table
n
a(n)
1
1
2
2
3
4
4
8
5
16
6
18
7
36
8
72
9
144
10
288
11
1800
12
3600
13
7200
[1,2,4,8,16,18,36,72,144,288,1800,3600,7200]