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A213735 as a simple table

na(n)
01
11
2-1
31
4-3
51
61
7-6
87
9-1
101
11-10
1225
13-15
141
151
16-15
1765
18-90
1931
20-1
211
22-21
23140
24-350
25301
26-63
271
281
29-28
30266
31-1050
321701
33-966
34127
35-1
361
37-36
38462
39-2646
406951
41-7770
423025
43-255
441
451
46-45
47750
48-5880
4922827
50-42525
5134105
52-9330
53511
54-1

[1,1,-1,1,-3,1,1,-6,7,-1,1,-10,25,-15,1,1,-15,65,
 -90,31,-1,1,-21,140,-350,301,-63,1,1,-28,266,
 -1050,1701,-966,127,-1,1,-36,462,-2646,6951,-7770,
 3025,-255,1,1,-45,750,-5880,22827,-42525,34105,
 -9330,511,-1]