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A266654
as a simple table
n
a(n)
1
1
2
3
3
829
4
1044230
5
3801147519
6
32355628895416
7
552401151665874798
8
17030692774688332735790
[1,3,829,1044230,3801147519,32355628895416, 552401151665874798,17030692774688332735790]