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A139809 as a simple table

na(n)
11
21
34
4-2
5-4
628
748
84
932
10-32
11-544
12-368
131472
141536
1512
1648
17-672
18-2656
198304
2036480
21-15360
22-144384
23-56064
24166912
25122880
2636
27432
28-1440
29-28320
30-13296
31549888
32811264
33-4222976
34-8578560
3513056000
3635942400
37-10592256
38-64811008
39-17072128
4041877504
4123592960
42-144
43-864

[1,1,4,-2,-4,28,48,4,32,-32,-544,-368,1472,1536,
 12,48,-672,-2656,8304,36480,-15360,-144384,-56064,
 166912,122880,36,432,-1440,-28320,-13296,549888,
 811264,-4222976,-8578560,13056000,35942400,
 -10592256,-64811008,-17072128,41877504,23592960,
 -144,-864]