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A300209
as a simple table
n
a(n)
1
1
2
8
3
228
4
22194
5
7452385
6
8664017314
7
34824178698922
8
483558835111191345
9
23194796188589638077072
[1,8,228,22194,7452385,8664017314,34824178698922, 483558835111191345,23194796188589638077072]