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A131777 as a simple table

na(n)
11
25
31
41
55
61
75
8-3
910
101
111
125
133
1410
151
165
17-7
1820
19-1
2015
211
221
235
241
2520
2610
2715
281
295
30-11
3130
32-15
3350
346
3520
361
371
385
39-5
4030
4115
4250
4322
4420
451
465
47-15
4840
49-45
50105
51-9
52100
5318
5425
551

[1,5,1,1,5,1,5,-3,10,1,1,5,3,10,1,5,-7,20,-1,15,1,
 1,5,1,20,10,15,1,5,-11,30,-15,50,6,20,1,1,5,-5,30,
 15,50,22,20,1,5,-15,40,-45,105,-9,100,18,25,1]