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A099932 as a simple table

na(n)
01
12
2-1
34
4-4
58
6-12
72
816
9-32
1016
1132
12-80
1380
14-16
1564
16-192
17320
18-192
19128
20-448
211120
22-1344
23272
24256
25-1024
263584
27-7168
284352
29512
30-2304
3110752
32-32256
3339168
34-7936
351024
36-5120
3730720
38-129024
39261120
40-158720
412048
42-11264

[1,2,-1,4,-4,8,-12,2,16,-32,16,32,-80,80,-16,64,
 -192,320,-192,128,-448,1120,-1344,272,256,-1024,
 3584,-7168,4352,512,-2304,10752,-32256,39168,
 -7936,1024,-5120,30720,-129024,261120,-158720,
 2048,-11264]