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A285409 as a simple table

na(n)
01
1-1
21
31
4-3
51
6-1
75
83
9-13
1019
11-41
129
1355
14-55
15113
16-99
1765
18-113
19-491
20843
21-245
22-325
231295
24-783
25-121
26-887
27-287
282685
29-6911
307559
3112413
32-36669
3312179
3442211
35-59681
3655281
37-22313
3838633
3919361
40-465579
41877913
42-711185
43-575339
442540955
45-3065165
461681907
47-29953
48-1287375
497293527
50-19374047

[1,-1,1,1,-3,1,-1,5,3,-13,19,-41,9,55,-55,113,-99,
 65,-113,-491,843,-245,-325,1295,-783,-121,-887,
 -287,2685,-6911,7559,12413,-36669,12179,42211,
 -59681,55281,-22313,38633,19361,-465579,877913,
 -711185,-575339,2540955,-3065165,1681907,-29953,
 -1287375,7293527,-19374047]