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A145900 as a simple table

na(n)
21
3-1
44
5-8
64
710
8-20
9-12
1034
11-12
1220
13-40
14-52
1572
1684
17-116
1832
1935
20-70
21-95
22-52
23130
24328
2563
26-224
27-387
28352
29-80
3056
31-112
32-156
33-180
34212
35560
36304
37348
38-380
39-1416
40-540
41640
421464
43-992
44192

[1,-1,4,-8,4,10,-20,-12,34,-12,20,-40,-52,72,84,
 -116,32,35,-70,-95,-52,130,328,63,-224,-387,352,
 -80,56,-112,-156,-180,212,560,304,348,-380,-1416,
 -540,640,1464,-992,192]