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A254933 as a simple table

na(n)
1-1
2-8
31
4-90
518
6-2
7-1344
8336
9-64
106
11-25200
127200
13-1800
14300
15-24
16-570240
17178200
18-52800
1911880
20-1728
21120
22-15135120
235045040
24-1681680
25458640
26-91728
2711760
28-720
29-461260800
30161441280
31-58705920
3218345600
33-4515840
34806400
35-92160
365040
37-15878903040
385774146560
39-2245501440
40777288960
41-222082560
4249351680
43-7931520
44816480
45-40320

[-1,-8,1,-90,18,-2,-1344,336,-64,6,-25200,7200,
 -1800,300,-24,-570240,178200,-52800,11880,-1728,
 120,-15135120,5045040,-1681680,458640,-91728,
 11760,-720,-461260800,161441280,-58705920,
 18345600,-4515840,806400,-92160,5040,-15878903040,
 5774146560,-2245501440,777288960,-222082560,
 49351680,-7931520,816480,-40320]