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A294699 as a simple table

na(n)
01
11
2-1
31
4-1
5-1
61
7-1
8-16
90
101
11-1
12-256
13-713
140
151
16-1
17-4096
18-531185
19-64711
201
211
22-1
23-65536
24-387416393
25-4294405135
26-9688521
270
281
29-1
30-1048576
31-282429470945
32-281474581032631
33-95363000655153
34-2165724176
351
361

[1,1,-1,1,-1,-1,1,-1,-16,0,1,-1,-256,-713,0,1,-1,
 -4096,-531185,-64711,1,1,-1,-65536,-387416393,
 -4294405135,-9688521,0,1,-1,-1048576,
 -282429470945,-281474581032631,-95363000655153,
 -2165724176,1,1]