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A184345
as a simple table
n
a(n)
1
1
2
1
3
2
4
1
5
4
6
7
7
17
8
200
9
353
10
4751
11
9857
12
83181
13
252001
14
1229378
15
5152888
16
16936394
17
88336546
18
241607686
[1,1,2,1,4,7,17,200,353,4751,9857,83181,252001, 1229378,5152888,16936394,88336546,241607686]