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A127674 as a simple table

na(n)
01
1-1
22
31
4-8
58
6-1
718
8-48
932
101
11-32
12160
13-256
14128
15-1
1650
17-400
181120
19-1280
20512
211
22-72
23840
24-3584
256912
26-6144
272048
28-1
2998
30-1568
319408
32-26880
3339424
34-28672
358192
361
37-128
382688
39-21504
4084480
41-180224
42212992
43-131072
4432768
45-1
46162
47-4320
4844352
49-228096
50658944
51-1118208

[1,-1,2,1,-8,8,-1,18,-48,32,1,-32,160,-256,128,-1,
 50,-400,1120,-1280,512,1,-72,840,-3584,6912,-6144,
 2048,-1,98,-1568,9408,-26880,39424,-28672,8192,1,
 -128,2688,-21504,84480,-180224,212992,-131072,
 32768,-1,162,-4320,44352,-228096,658944,-1118208]