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A320770 as a simple table

na(n)
01
11
22
32
4-4
5-4
6-8
7-8
816
916
1032
1132
12-64
13-64
14-128
15-128
16256
17256
18512
19512
20-1024
21-1024
22-2048
23-2048
244096
254096
268192
278192
28-16384
29-16384
30-32768
31-32768
3265536
3365536
34131072
35131072
36-262144
37-262144
38-524288
39-524288
401048576
411048576

[1,1,2,2,-4,-4,-8,-8,16,16,32,32,-64,-64,-128,
 -128,256,256,512,512,-1024,-1024,-2048,-2048,4096,
 4096,8192,8192,-16384,-16384,-32768,-32768,65536,
 65536,131072,131072,-262144,-262144,-524288,
 -524288,1048576,1048576]