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A112570 as a simple table

na(n)
01
11
21
31
4-1
52
60
71
8-2
95
10-5
114
12-6
1318
14-30
1535
16-43
1784
18-167
19261
20-352
21545
22-1010
231790
24-2783
254207
26-7025
2712464
28-21071
2933567
30-54154
3192317
32-159366
33266150
34-435285
35725260
36-1239404
372112351
38-3535532
395894852
40-9964767
4117008752
42-28880694
4348645873

[1,1,1,1,-1,2,0,1,-2,5,-5,4,-6,18,-30,35,-43,84,
 -167,261,-352,545,-1010,1790,-2783,4207,-7025,
 12464,-21071,33567,-54154,92317,-159366,266150,
 -435285,725260,-1239404,2112351,-3535532,5894852,
 -9964767,17008752,-28880694,48645873]