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A098864
as a simple table
n
a(n)
1
1
2
2
3
4
4
8
5
15
6
46
7
58
8
74
9
262
10
898
11
13110
12
20256
13
21632
[1,2,4,8,15,46,58,74,262,898,13110,20256,21632]