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A040173
as a simple table
n
a(n)
1
1
2
3
3
1
4
3
5
19
6
53
7
103
8
4111
9
78293
10
29401
11
4462987
12
9830941
13
284397779
[1,3,1,3,19,53,103,4111,78293,29401,4462987, 9830941,284397779]