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A317224
as a simple table
n
a(n)
1
1
2
8
3
46
4
490
5
17039
6
929233
7
98315821
8
35202633059
9
29277174452171
10
53088150169443705
[1,8,46,490,17039,929233,98315821,35202633059, 29277174452171,53088150169443705]