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A140874 as a simple table

na(n)
2-4
3-4
4-8
5-3
6-12
7-13
8-1
9-15
10-25
11-19
122
13-16
14-40
15-44
16-26
176
18-14
19-56
20-84
21-70
22-34
2311
24-8
25-70
26-140
27-154
28-104
29-43
3017
313
32-78
33-210
34-294
35-258
36-147
37-53
3824
3920
40-75
41-288
42-504
43-552
44-405
45-200
46-64

[-4,-4,-8,-3,-12,-13,-1,-15,-25,-19,2,-16,-40,-44,
 -26,6,-14,-56,-84,-70,-34,11,-8,-70,-140,-154,
 -104,-43,17,3,-78,-210,-294,-258,-147,-53,24,20,
 -75,-288,-504,-552,-405,-200,-64]