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A090132 as a simple table

na(n)
01
10
2-2
34
4-4
50
68
7-16
816
90
10-32
1164
12-64
130
14128
15-256
16256
170
18-512
191024
20-1024
210
222048
23-4096
244096
250
26-8192
2716384
28-16384
290
3032768
31-65536
3265536
330
34-131072
35262144
36-262144
370
38524288
39-1048576
401048576
410
42-2097152
434194304
44-4194304
450
468388608

[1,0,-2,4,-4,0,8,-16,16,0,-32,64,-64,0,128,-256,
 256,0,-512,1024,-1024,0,2048,-4096,4096,0,-8192,
 16384,-16384,0,32768,-65536,65536,0,-131072,
 262144,-262144,0,524288,-1048576,1048576,0,
 -2097152,4194304,-4194304,0,8388608]