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A139815 as a simple table

na(n)
13
2-16
34
488
5-48
68
7-496
8432
9-144
1016
112848
12-3456
131728
14-384
1532
16-16576
1725920
18-17280
195760
20-960
2164
2297408
23-186624
24155520
25-69120
2617280
27-2304
28128
29-576256
301306368
31-1306368
32725760
33-241920
3448384
35-5376
36256
373424768
38-8957952
3910450944
40-6967296
412903040
42-774144
43129024

[3,-16,4,88,-48,8,-496,432,-144,16,2848,-3456,
 1728,-384,32,-16576,25920,-17280,5760,-960,64,
 97408,-186624,155520,-69120,17280,-2304,128,
 -576256,1306368,-1306368,725760,-241920,48384,
 -5376,256,3424768,-8957952,10450944,-6967296,
 2903040,-774144,129024]