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A128636 as a simple table

na(n)
01
11
2-3
33
45
5-18
615
724
8-75
957
1086
11-252
12183
13262
14-744
15522
16725
17-1998
181365
191852
20-4986
213336
224436
23-11736
247719
2510103
26-26322
2717067
2822040
29-56682
3036306
3146336
32-117867
3374700
3494378
35-237744
36149277
37186926
38-466836
39290706
40361126
41-895014

[1,1,-3,3,5,-18,15,24,-75,57,86,-252,183,262,-744,
 522,725,-1998,1365,1852,-4986,3336,4436,-11736,
 7719,10103,-26322,17067,22040,-56682,36306,46336,
 -117867,74700,94378,-237744,149277,186926,-466836,
 290706,361126,-895014]