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A057542
as a simple table
n
a(n)
0
1
1
1
2
1
3
3
4
4
5
16
6
87
7
202
8
607
9
1441
10
4708
11
41888
12
44741
13
339108
14
1617551
[1,1,1,3,4,16,87,202,607,1441,4708,41888,44741, 339108,1617551]