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A143065 as a simple table

na(n)
01
10
20
3-1
41
5-2
62
7-3
84
9-5
106
11-8
1211
13-13
1416
15-21
1627
17-32
1839
19-49
2061
21-73
2287
23-107
24131
25-155
26184
27-223
28267
29-315
30372
31-443
32526
33-617
34722
35-852
361002
37-1167
381359
39-1590
401854
41-2148
422488
43-2888
443346
45-3859
464444
47-5128
485909
49-6779
507773

[1,0,0,-1,1,-2,2,-3,4,-5,6,-8,11,-13,16,-21,27,
 -32,39,-49,61,-73,87,-107,131,-155,184,-223,267,
 -315,372,-443,526,-617,722,-852,1002,-1167,1359,
 -1590,1854,-2148,2488,-2888,3346,-3859,4444,-5128,
 5909,-6779,7773]