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A197443
as a simple table
n
a(n)
1
1
2
5
3
81
4
4837
5
1108699
6
982926107
7
3148323076125
8
37516007592943532
9
1657994465210882573048
[1,5,81,4837,1108699,982926107,3148323076125, 37516007592943532,1657994465210882573048]