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A012629 as a simple table

na(n)
00
12
2-12
3-2
410248
5-914598
658990140
7390971670
8-1399074591600
9414051949573170
10-75189740418805500
11-1988456671385842770
1210786170755283590925720
13-6649588570098570005749110
142348244702630162770320062540
15166785234190504460598054627270
16-1188356567924627353096569058456800

[0,2,-12,-2,10248,-914598,58990140,390971670,
 -1399074591600,414051949573170,-75189740418805500,
 -1988456671385842770,10786170755283590925720,
 -6649588570098570005749110,
 2348244702630162770320062540,
 166785234190504460598054627270,
 -1188356567924627353096569058456800]