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A140956 as a simple table

na(n)
11
21
31
4-2
5-1
61
7-6
8-5
92
101
1124
1214
13-13
14-2
151
16120
1794
18-51
19-23
203
211
22-720
23-444
24400
2587
26-41
27-3
281
29-5040
30-3828
312356
321009
33-200
34-62
354
361
3740320
3825584
39-22676
40-5716
412609
42296
43-94
44-4
451
46362880
47270576
48-178500
49-74120
5017765
515273
52-550
53-130
545
551

[1,1,1,-2,-1,1,-6,-5,2,1,24,14,-13,-2,1,120,94,
 -51,-23,3,1,-720,-444,400,87,-41,-3,1,-5040,-3828,
 2356,1009,-200,-62,4,1,40320,25584,-22676,-5716,
 2609,296,-94,-4,1,362880,270576,-178500,-74120,
 17765,5273,-550,-130,5,1]