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A187419
as a simple table
n
a(n)
0
3
1
3
2
7
3
3
4
37
5
43
6
163
7
1171
8
607
9
223
10
1987
11
3541
12
23917
13
43627
14
8887
15
108517
16
1063
17
378667
[3,3,7,3,37,43,163,1171,607,223,1987,3541,23917, 43627,8887,108517,1063,378667]