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A137429 as a simple table

na(n)
01
1-4
26
3-4
4-4
516
6-24
716
816
9-64
1096
11-64
12-64
13256
14-384
15256
16256
17-1024
181536
19-1024
20-1024
214096
22-6144
234096
244096
25-16384
2624576
27-16384
28-16384
2965536
30-98304
3165536
3265536
33-262144
34393216
35-262144
36-262144
371048576
38-1572864
391048576
401048576
41-4194304
426291456

[1,-4,6,-4,-4,16,-24,16,16,-64,96,-64,-64,256,
 -384,256,256,-1024,1536,-1024,-1024,4096,-6144,
 4096,4096,-16384,24576,-16384,-16384,65536,-98304,
 65536,65536,-262144,393216,-262144,-262144,
 1048576,-1572864,1048576,1048576,-4194304,6291456]