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A002607 as a simple table

na(n)
11
216
30
4256
5-1054
60
70
84096
96561
10-16864
110
120
13-478
140
150
1665536
17-63358
18104976
190
20-269824
210
220
230
240
25720291
26-7648
270
280
29-1407838
300
310
321048576
330
34-1013728
350
361679616
37925922
380
390
40-4317184
413577922
420
430
440
45-6915294
460
470
480
495764801
5011524656
510
52-122368

[1,16,0,256,-1054,0,0,4096,6561,-16864,0,0,-478,0,
 0,65536,-63358,104976,0,-269824,0,0,0,0,720291,
 -7648,0,0,-1407838,0,0,1048576,0,-1013728,0,
 1679616,925922,0,0,-4317184,3577922,0,0,0,
 -6915294,0,0,0,5764801,11524656,0,-122368]