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A129716 as a simple table

na(n)
01
12
23
310
440
5196
61176
78352
866816
9589248
105892480
1167841280
12814095360
139007096320
14126099348480
153417110323200
1654673765171200
17-1593137026252800
18-28676466472550400
196142121597716070400
20122842431954321408000
21-24453765000305786880000

[1,2,3,10,40,196,1176,8352,66816,589248,5892480,
 67841280,814095360,9007096320,126099348480,
 3417110323200,54673765171200,-1593137026252800,
 -28676466472550400,6142121597716070400,
 122842431954321408000,-24453765000305786880000]