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A065109 as a simple table

na(n)
01
12
2-1
34
4-4
51
68
7-12
86
9-1
1016
11-32
1224
13-8
141
1532
16-80
1780
18-40
1910
20-1
2164
22-192
23240
24-160
2560
26-12
271
28128
29-448
30672
31-560
32280
33-84
3414
35-1
36256
37-1024
381792
39-1792
401120
41-448
42112
43-16
441
45512
46-2304
474608
48-5376
494032
50-2016
51672
52-144
5318
54-1
551024
56-5120
5711520
58-15360
5913440

[1,2,-1,4,-4,1,8,-12,6,-1,16,-32,24,-8,1,32,-80,
 80,-40,10,-1,64,-192,240,-160,60,-12,1,128,-448,
 672,-560,280,-84,14,-1,256,-1024,1792,-1792,1120,
 -448,112,-16,1,512,-2304,4608,-5376,4032,-2016,
 672,-144,18,-1,1024,-5120,11520,-15360,13440]