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A077989 as a simple table

na(n)
01
1-2
23
3-2
4-3
514
6-29
738
8-19
9-58
10211
11-402
12477
13-130
14-1021
153126
16-5491
175814
18115
19-17026
2045565
21-73874
2268131
2328742
24-273363
25654246
26-977645
27754318
28777501
29-4264610
309260355
31-12701098
327612621
3315996566
34-65007949
35129244574
36-161488067
3763715662
38292545891

[1,-2,3,-2,-3,14,-29,38,-19,-58,211,-402,477,-130,
 -1021,3126,-5491,5814,115,-17026,45565,-73874,
 68131,28742,-273363,654246,-977645,754318,777501,
 -4264610,9260355,-12701098,7612621,15996566,
 -65007949,129244574,-161488067,63715662,292545891]