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A013165 as a simple table

na(n)
01
10
24
3-6
4115
5-500
68830
7-70770
81316825
9-15886440
10324218600
11-5249917750
12119185529675
13-2412502361100
1461104527105050
15-1476059511449250
1641607421213320625
17-1162370434739930000

[1,0,4,-6,115,-500,8830,-70770,1316825,-15886440,
 324218600,-5249917750,119185529675,-2412502361100,
 61104527105050,-1476059511449250,
 41607421213320625,-1162370434739930000]