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A225132 as a simple table

na(n)
11
2-1
31
4-2
53
6-4
75
8-8
912
10-16
1122
12-32
1345
14-62
1587
16-124
17175
18-244
19343
20-484
21679
22-952
231339
24-1884
252646
26-3716
275224
28-7342
2910313
30-14490
3120365
32-28618
3340210
34-56502
3579400
36-111570
37156769
38-220290
39309553
40-434974
41611210
42-858864
431206862

[1,-1,1,-2,3,-4,5,-8,12,-16,22,-32,45,-62,87,-124,
 175,-244,343,-484,679,-952,1339,-1884,2646,-3716,
 5224,-7342,10313,-14490,20365,-28618,40210,-56502,
 79400,-111570,156769,-220290,309553,-434974,
 611210,-858864,1206862]