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A285638 as a simple table

na(n)
01
10
2-1
3-2
40
50
6-1
7-4
8-4
9-2
10-3
11-6
12-13
13-16
14-19
15-24
16-38
17-60
18-82
19-110
20-150
21-224
22-324
23-458
24-637
25-898
26-1289
27-1838
28-2609
29-3680
30-5223
31-7430
32-10571
33-15004
34-21272
35-30202
36-42903
37-60960
38-86543
39-122860
40-174450
41-247762
42-351883
43-499668
44-709521
45-1007532

[1,0,-1,-2,0,0,-1,-4,-4,-2,-3,-6,-13,-16,-19,-24,
 -38,-60,-82,-110,-150,-224,-324,-458,-637,-898,
 -1289,-1838,-2609,-3680,-5223,-7430,-10571,-15004,
 -21272,-30202,-42903,-60960,-86543,-122860,
 -174450,-247762,-351883,-499668,-709521,-1007532]