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A111999 as a simple table

na(n)
1-1
23
32
4-15
5-20
6-6
7105
8210
9130
1024
11-945
12-2520
13-2380
14-924
15-120
1610395
1734650
1844100
1926432
207308
21720
22-135135
23-540540
24-866250
25-705320
26-303660
27-64224
28-5040
292027025
309459450
3118288270
3218858840
3311098780
343678840
35623376
3640320
37-34459425
38-183783600
39-416215800

[-1,3,2,-15,-20,-6,105,210,130,24,-945,-2520,
 -2380,-924,-120,10395,34650,44100,26432,7308,720,
 -135135,-540540,-866250,-705320,-303660,-64224,
 -5040,2027025,9459450,18288270,18858840,11098780,
 3678840,623376,40320,-34459425,-183783600,
 -416215800]