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A363412 as a simple table

na(n)
00
11
23
3-12
4-140
5420
613692
7-23744
8-2366784
9126000
10641927440
111306329024
12-252172135488
13-1138135788608
14135593735484480
15999117715814400
16-95707279587325952
17-1013737882826462976
1885873512374909086464
191217682899871358735360
20-95486742904897158097920

[0,1,3,-12,-140,420,13692,-23744,-2366784,126000,
 641927440,1306329024,-252172135488,-1138135788608,
 135593735484480,999117715814400,
 -95707279587325952,-1013737882826462976,
 85873512374909086464,1217682899871358735360,
 -95486742904897158097920]