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A331430 as a simple table

na(n)
0-1
1-1
22
3-1
46
5-6
6-1
712
8-30
920
10-1
1120
12-90
13140
14-70
15-1
1630
17-210
18560
19-630
20252
21-1
2242
23-420
241680
25-3150
262772
27-924
28-1
2956
30-756
314200
32-11550
3316632
34-12012
353432
36-1
3772
38-1260
399240
40-34650
4172072
42-84084
4351480
44-12870
45-1
4690
47-1980
4818480
49-90090
50252252
51-420420
52411840
53-218790
5448620
55-1
56110
57-2970
5834320
59-210210
60756756
61-1681680
622333760
63-1969110
64923780
65-184756

[-1,-1,2,-1,6,-6,-1,12,-30,20,-1,20,-90,140,-70,
 -1,30,-210,560,-630,252,-1,42,-420,1680,-3150,
 2772,-924,-1,56,-756,4200,-11550,16632,-12012,
 3432,-1,72,-1260,9240,-34650,72072,-84084,51480,
 -12870,-1,90,-1980,18480,-90090,252252,-420420,
 411840,-218790,48620,-1,110,-2970,34320,-210210,
 756756,-1681680,2333760,-1969110,923780,-184756]