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A039683 as a simple table

na(n)
11
2-2
31
48
5-6
61
7-48
844
9-12
101
11384
12-400
13140
14-20
151
16-3840
174384
18-1800
19340
20-30
211
2246080
23-56448
2425984
25-5880
26700
27-42
281
29-645120
30836352
31-420224
32108304
33-15680
341288
35-56
361
3710321920
38-14026752
397559936
40-2153088
41359184
42-36288
432184
44-72
451

[1,-2,1,8,-6,1,-48,44,-12,1,384,-400,140,-20,1,
 -3840,4384,-1800,340,-30,1,46080,-56448,25984,
 -5880,700,-42,1,-645120,836352,-420224,108304,
 -15680,1288,-56,1,10321920,-14026752,7559936,
 -2153088,359184,-36288,2184,-72,1]