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A222783
as a simple table
n
a(n)
1
3960
2
213840
3
49904176
4
2293746012
5
279998448898
6
12671662224780
7
1117919582690144
8
51006951713167704
[3960,213840,49904176,2293746012,279998448898, 12671662224780,1117919582690144,51006951713167704]