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A107332 as a simple table

na(n)
10
21
30
40
5-1
6-1
7-1
8-1
9-1
10-2
11-3
12-5
13-7
14-10
15-14
16-20
17-29
18-42
19-61
20-88
21-127
22-183
23-264
24-381
25-550
26-794
27-1146
28-1654
29-2387
30-3445
31-4972
32-7176
33-10357
34-14948
35-21574
36-31137
37-44939
38-64859
39-93609
40-135103
41-194990
42-281423
43-406169
44-586211
45-846060
46-1221092
47-1762364

[0,1,0,0,-1,-1,-1,-1,-1,-2,-3,-5,-7,-10,-14,-20,
 -29,-42,-61,-88,-127,-183,-264,-381,-550,-794,
 -1146,-1654,-2387,-3445,-4972,-7176,-10357,-14948,
 -21574,-31137,-44939,-64859,-93609,-135103,
 -194990,-281423,-406169,-586211,-846060,-1221092,
 -1762364]