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A134685 as a simple table

na(n)
11
2-1
33
4-1
5-15
610
7-1
8105
9-105
1010
1115
12-1
13-945
141260
15-280
16-210
1735
1821
19-1
2010395
21-17325
226300
233150
24-280
25-1260
26-378
2735
2856
2928
30-1
31-135135
32270270
33-138600
34-51975
3515400
3634650
376930
38-2100
39-1575
40-2520
41-630
42126
4384
4436
45-1

[1,-1,3,-1,-15,10,-1,105,-105,10,15,-1,-945,1260,
 -280,-210,35,21,-1,10395,-17325,6300,3150,-280,
 -1260,-378,35,56,28,-1,-135135,270270,-138600,
 -51975,15400,34650,6930,-2100,-1575,-2520,-630,
 126,84,36,-1]