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A018515
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
8
7
12
8
23
9
24
10
46
11
69
12
92
13
138
14
184
15
276
16
552
[1,2,3,4,6,8,12,23,24,46,69,92,138,184,276,552]