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A154586
as a simple table
n
a(n)
1
1
2
4
3
8
4
25
5
27
6
75
7
209
8
3507
9
8466
10
16179
11
29285
12
33987
13
175904
14
326764
15
1161207
[1,4,8,25,27,75,209,3507,8466,16179,29285,33987, 175904,326764,1161207]