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A220186 as a simple table

na(n)
10
28
3800
478408
57683200
6752875208
773774087200
87229107670408
9708378777612800
1069413891098384008
116801852948864020000
12666512175097575576008
1365311391306613542428800
146399849835873029582446408
15627119972524250285537319200

[0,8,800,78408,7683200,752875208,73774087200,
 7229107670408,708378777612800,69413891098384008,
 6801852948864020000,666512175097575576008,
 65311391306613542428800,6399849835873029582446408,
 627119972524250285537319200]