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A107952
as a simple table
n
a(n)
1
1
2
4
3
6
4
23
5
25
6
36
7
84
8
499
9
857
10
1393
11
1741
12
1961
13
106527
14
130617
15
257090
16
1912295
17
2647129
[1,4,6,23,25,36,84,499,857,1393,1741,1961,106527, 130617,257090,1912295,2647129]