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A352070 as a simple table

na(n)
01
11
21
310
410
5604
6-1844
7107344
8-1201400
942193576
10-875584376
1129853569008
12-880141783184
1332865860907424
14-1216481572723616
1551296026356128512
16-2244334822166729600
17106984479644794783360
18-5358207684820194270080
19286466413246622566048000

[1,1,1,10,10,604,-1844,107344,-1201400,42193576,
 -875584376,29853569008,-880141783184,
 32865860907424,-1216481572723616,
 51296026356128512,-2244334822166729600,
 106984479644794783360,-5358207684820194270080,
 286466413246622566048000]