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A228549 as a simple table

na(n)
11
2-1
3-2
43
52
6-1
7-5
825
9-20
10-16
11-7
1223
13-39
1425
15309
16455
17901
18-2168
19920
201047
212302
22-1536
233272
24161162
25-289493
26-529263
271418949
28-1562590
29-579999
3015145
315844471
325244416
33-65749104
34176617384
352077411081
367381004327
3710211507191
38-10333531933
397086785521
408502336136

[1,-1,-2,3,2,-1,-5,25,-20,-16,-7,23,-39,25,309,
 455,901,-2168,920,1047,2302,-1536,3272,161162,
 -289493,-529263,1418949,-1562590,-579999,15145,
 5844471,5244416,-65749104,176617384,2077411081,
 7381004327,10211507191,-10333531933,7086785521,
 8502336136]