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A203221
as a simple table
n
a(n)
1
1
2
4
3
13
4
192
5
3348
6
138856
7
12107039
8
1984499004
9
706287228121
10
496787163840091
[1,4,13,192,3348,138856,12107039,1984499004, 706287228121,496787163840091]