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A168522 as a simple table

na(n)
10
21
398
49602
5940800
692179196
79031679608
8884920243192
986704120473600
108495233965926416
11832359520419841568
1281554242533212620832
137990651049213997158400
14782920694337905296281536
1576710246743016291041273728
167516038339426920711452262272

[0,1,98,9602,940800,92179196,9031679608,
 884920243192,86704120473600,8495233965926416,
 832359520419841568,81554242533212620832,
 7990651049213997158400,782920694337905296281536,
 76710246743016291041273728,
 7516038339426920711452262272]