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A078491 as a simple table

na(n)
01
11
22
360
4360360
5219060189739591200
61749342047920660916901891145781670987072592322134428432000

[1,1,2,60,360360,219060189739591200,
 17493420479206609169018911457816709870725923221344\
 28432000]