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A285287 as a simple table

na(n)
01
1-1
21
3-1
41
5-6
66
7-6
86
9-15
1030
11-30
1230
13-43
1488
15-123
16123
17-140
18250
19-385
20455
21-476
22678
23-1098
241413
25-1564
261913
27-2918
284048
29-4707
305452
31-7572
3210747
33-13265
3415195
35-19534
3627349
37-35146
3841042
39-50011
4067596
41-88897
42106519
43-126635
44164230

[1,-1,1,-1,1,-6,6,-6,6,-15,30,-30,30,-43,88,-123,
 123,-140,250,-385,455,-476,678,-1098,1413,-1564,
 1913,-2918,4048,-4707,5452,-7572,10747,-13265,
 15195,-19534,27349,-35146,41042,-50011,67596,
 -88897,106519,-126635,164230]