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A180208
as a simple table
n
a(n)
1
1
2
2
3
4
4
8
5
16
6
32
7
66
8
148
9
376
10
1138
11
3834
12
14832
13
60584
14
263480
15
1159034
16
5218514
[1,2,4,8,16,32,66,148,376,1138,3834,14832,60584, 263480,1159034,5218514]