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A197159
as a simple table
n
a(n)
1
1
2
3
3
8
4
25
5
80
6
291
7
1036
8
3875
9
14561
10
55624
11
213951
12
830712
13
3244355
14
12747718
15
50320659
[1,3,8,25,80,291,1036,3875,14561,55624,213951, 830712,3244355,12747718,50320659]