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A144456 as a simple table

na(n)
11
2-1
31
4-2
5-3
62
7-6
8-29
9-31
106
11-30
12-299
13-920
14-869
1530
16-210
17-3569
18-21193
19-51769
20-43853
21210
22-2310
23-64679
24-665252
25-3136692
26-6760012
27-5333173
282310
29-30030
30-1231229
31-19579519
32-153212408
33-618042328
34-1212020249
35-901760539
3630030
37-510510
38-29609579
39-688677932

[1,-1,1,-2,-3,2,-6,-29,-31,6,-30,-299,-920,-869,
 30,-210,-3569,-21193,-51769,-43853,210,-2310,
 -64679,-665252,-3136692,-6760012,-5333173,2310,
 -30030,-1231229,-19579519,-153212408,-618042328,
 -1212020249,-901760539,30030,-510510,-29609579,
 -688677932]