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A247568
as a simple table
n
a(n)
2
2
3
3
4
8
5
20
6
6
7
8
8
16
9
27
10
40
11
110
12
24
13
156
14
15
15
60
16
32
17
272
18
54
19
57
20
80
[2,3,8,20,6,8,16,27,40,110,24,156,15,60,32,272,54, 57,80]