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A125066
as a simple table
n
a(n)
9
4
10
4
11
39
12
58
13
214
14
502
15
1621
16
3958
17
12295
18
30962
19
91967
20
245143
21
720699
[4,4,39,58,214,502,1621,3958,12295,30962,91967, 245143,720699]