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A363092 as a simple table

na(n)
01
11
2-4
3-24
4-64
5-64
6256
71536
84096
94096
10-16384
11-98304
12-262144
13-262144
141048576
156291456
1616777216
1716777216
18-67108864
19-402653184
20-1073741824
21-1073741824
224294967296
2325769803776
2468719476736
2568719476736
26-274877906944
27-1649267441664
28-4398046511104

[1,1,-4,-24,-64,-64,256,1536,4096,4096,-16384,
 -98304,-262144,-262144,1048576,6291456,16777216,
 16777216,-67108864,-402653184,-1073741824,
 -1073741824,4294967296,25769803776,68719476736,
 68719476736,-274877906944,-1649267441664,
 -4398046511104]