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A102561 as a simple table

na(n)
01
10
20
3-2
44
50
60
7-8
816
90
100
11-32
1264
130
140
15-128
16256
170
180
19-512
201024
210
220
23-2048
244096
250
260
27-8192
2816384
290
300
31-32768
3265536
330
340
35-131072
36262144
370
380
39-524288
401048576
410
420
43-2097152
444194304
450
460
47-8388608
4816777216
490
500
51-33554432
5267108864
530
540
55-134217728

[1,0,0,-2,4,0,0,-8,16,0,0,-32,64,0,0,-128,256,0,0,
 -512,1024,0,0,-2048,4096,0,0,-8192,16384,0,0,
 -32768,65536,0,0,-131072,262144,0,0,-524288,
 1048576,0,0,-2097152,4194304,0,0,-8388608,
 16777216,0,0,-33554432,67108864,0,0,-134217728]