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A299655
as a simple table
n
a(n)
1
1
2
8
3
227
4
22087
5
7411398
6
8607101770
7
34546300829517
8
478911551660693464
9
22930235691929943217996
[1,8,227,22087,7411398,8607101770,34546300829517, 478911551660693464,22930235691929943217996]