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A203453
as a simple table
n
a(n)
1
1
2
3
3
84
4
8837
5
5660631
6
22078482448
7
449985495293440
8
48224646798077538850
[1,3,84,8837,5660631,22078482448,449985495293440, 48224646798077538850]