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A012052 as a simple table

na(n)
01
10
2-4
3-136
4-7408
5-644416
6-84562880
7-15811723136
8-4005496370944
9-1317763889887232
10-544096638435718144
11-274416039275290634240
12-165481485047921126273024
13-117299354914466636092850176

[1,0,-4,-136,-7408,-644416,-84562880,-15811723136,
 -4005496370944,-1317763889887232,
 -544096638435718144,-274416039275290634240,
 -165481485047921126273024,
 -117299354914466636092850176]