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A191462 as a simple table

na(n)
01
11
20
36
412
5100
6780
7-1092
843344
948816
101264320
1124662880
12-162851040
134327633440
14-17686783296
15275230488960
163743721112320
17-70886371933440
182127136959383040
19-25991855154846720
20402985066993459200

[1,1,0,6,12,100,780,-1092,43344,48816,1264320,
 24662880,-162851040,4327633440,-17686783296,
 275230488960,3743721112320,-70886371933440,
 2127136959383040,-25991855154846720,
 402985066993459200]