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A104537 as a simple table

na(n)
01
1-1
2-2
38
4-8
5-16
664
7-64
8-128
9512
10-512
11-1024
124096
13-4096
14-8192
1532768
16-32768
17-65536
18262144
19-262144
20-524288
212097152
22-2097152
23-4194304
2416777216
25-16777216
26-33554432
27134217728
28-134217728
29-268435456
301073741824
31-1073741824
32-2147483648
338589934592

[1,-1,-2,8,-8,-16,64,-64,-128,512,-512,-1024,4096,
 -4096,-8192,32768,-32768,-65536,262144,-262144,
 -524288,2097152,-2097152,-4194304,16777216,
 -16777216,-33554432,134217728,-134217728,
 -268435456,1073741824,-1073741824,-2147483648,
 8589934592]