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A127675 as a simple table

na(n)
01
1-4
23
316
4-20
55
6-64
7112
8-56
97
10256
11-576
12432
13-120
149
15-1024
162816
17-2816
181232
19-220
2011
214096
22-13312
2316640
24-9984
252912
26-364
2713
28-16384
2961440
30-92160
3170400
32-28800
336048
34-560
3515
3665536
37-278528
38487424
39-452608
40239360
41-71808
4211424
43-816
4417
45-262144
461245184

[1,-4,3,16,-20,5,-64,112,-56,7,256,-576,432,-120,
 9,-1024,2816,-2816,1232,-220,11,4096,-13312,16640,
 -9984,2912,-364,13,-16384,61440,-92160,70400,
 -28800,6048,-560,15,65536,-278528,487424,-452608,
 239360,-71808,11424,-816,17,-262144,1245184]