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A166211
as a simple table
n
a(n)
0
1
1
17
2
6
3
30
4
1207
5
8387
6
211677
7
34490146
8
884190706
9
123191992504
[1,17,6,30,1207,8387,211677,34490146,884190706, 123191992504]