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A163984 as a simple table

na(n)
11
21
3-2
44
5-3
65
7-4
8-2
93
107
11-9
1211
13-7
14-3
15-2
1616
17-13
1815
19-17
203
215
2213
23-20
24-2
2511
26-5
27-3
2825
29-27
3029
31-26
324
337
34-13
35-2
3636
37-19
38-7
39-7
4037
41-39
4241
43-35
44-3
4517
4625
47-44
48-2
495
509
51-5
5243
53-49
543
55-5
5615
5711
5831
59-54
6056
61-31
62-27
63-2
648
65-3
6661
67-53
687
69-17
7067
71-69
7271
73-37
74-25
755
76-11
773
7871
79-76
80-2
8139
8243
83-77
847
8529
86-15

[1,1,-2,4,-3,5,-4,-2,3,7,-9,11,-7,-3,-2,16,-13,15,
 -17,3,5,13,-20,-2,11,-5,-3,25,-27,29,-26,4,7,-13,
 -2,36,-19,-7,-7,37,-39,41,-35,-3,17,25,-44,-2,5,9,
 -5,43,-49,3,-5,15,11,31,-54,56,-31,-27,-2,8,-3,61,
 -53,7,-17,67,-69,71,-37,-25,5,-11,3,71,-76,-2,39,
 43,-77,7,29,-15]