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A349193
as a simple table
n
a(n)
1
1
2
2
3
6
4
42
5
1806
6
47058
7
2214502422
8
52495396602
9
8490421583559688410706771261086
[1,2,6,42,1806,47058,2214502422,52495396602, 8490421583559688410706771261086]