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A021010 as a simple table

na(n)
01
1-1
21
31
4-4
52
6-1
79
8-18
96
101
11-16
1272
13-96
1424
15-1
1625
17-200
18600
19-600
20120
211
22-36
23450
24-2400
255400
26-4320
27720
28-1
2949
30-882
317350
32-29400
3352920
34-35280
355040
361
37-64
381568
39-18816
40117600
41-376320
42564480
43-322560
4440320
45-1
4681
47-2592
4842336
49-381024
501905120
51-5080320
526531840
53-3265920
54362880

[1,-1,1,1,-4,2,-1,9,-18,6,1,-16,72,-96,24,-1,25,
 -200,600,-600,120,1,-36,450,-2400,5400,-4320,720,
 -1,49,-882,7350,-29400,52920,-35280,5040,1,-64,
 1568,-18816,117600,-376320,564480,-322560,40320,
 -1,81,-2592,42336,-381024,1905120,-5080320,
 6531840,-3265920,362880]