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A194575
as a simple table
n
a(n)
1
1
2
5
3
194
4
110064
5
1237399743
6
230795314260831
7
443383367826271457152
8
7112925826561472131385895933
[1,5,194,110064,1237399743,230795314260831, 443383367826271457152, 7112925826561472131385895933]