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A221137
as a simple table
n
a(n)
1
16
2
9801
3
3485689
4
1539699121
5
619901126244
6
259039174953636
7
106295637843093924
8
43910419047705413284
[16,9801,3485689,1539699121,619901126244, 259039174953636,106295637843093924, 43910419047705413284]