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A329521 as a simple table

na(n)
00
1-1
260
3-162
4-5280
520250
6128520
7-569380
8-1854720
99338490
1020097000
11-113704668
12-181621440
131142905764
141447926480
15-10042461000
16-10529925120
1779859881530
1871384175720
19-587933314540
20-457825368000
214070529226764

[0,-1,60,-162,-5280,20250,128520,-569380,-1854720,
 9338490,20097000,-113704668,-181621440,1142905764,
 1447926480,-10042461000,-10529925120,79859881530,
 71384175720,-587933314540,-457825368000,
 4070529226764]