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A104408 as a simple table

na(n)
01
10
21
3-1
41
5-1
62
7-2
83
9-3
104
11-5
126
13-6
148
15-9
1611
17-12
1815
19-17
2020
21-22
2226
23-30
2435
25-38
2645
27-51
2858
29-64
3074
31-83
3295
33-105
34119
35-134
36151
37-166
38188
39-210
40235
41-259
42291
43-323
44360
45-396
46441
47-489
48543
49-595
50661
51-730
52805
53-883
54976
55-1073
561182
57-1293
581423
59-1562
601714

[1,0,1,-1,1,-1,2,-2,3,-3,4,-5,6,-6,8,-9,11,-12,15,
 -17,20,-22,26,-30,35,-38,45,-51,58,-64,74,-83,95,
 -105,119,-134,151,-166,188,-210,235,-259,291,-323,
 360,-396,441,-489,543,-595,661,-730,805,-883,976,
 -1073,1182,-1293,1423,-1562,1714]