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A194809 as a simple table

na(n)
10
2-2
31
4-5
53
6-12
77
8-25
917
10-47
1136
12-88
1369
14-155
15133
16-262
17240
18-439
19415
20-717
21705
22-1142
231165
24-1803
251874
26-2797
272975
28-4276
294632
30-6478
317094
32-9698
3310741
34-14355
3516059
36-21079
3723719
38-30670
3934716
40-44243
4150315
42-63372

[0,-2,1,-5,3,-12,7,-25,17,-47,36,-88,69,-155,133,
 -262,240,-439,415,-717,705,-1142,1165,-1803,1874,
 -2797,2975,-4276,4632,-6478,7094,-9698,10741,
 -14355,16059,-21079,23719,-30670,34716,-44243,
 50315,-63372]