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A077950 as a simple table

na(n)
01
11
21
3-1
4-3
5-5
6-3
73
813
919
1013
11-13
12-51
13-77
14-51
1551
16205
17307
18205
19-205
20-819
21-1229
22-819
23819
243277
254915
263277
27-3277
28-13107
29-19661
30-13107
3113107
3252429
3378643
3452429
35-52429
36-209715
37-314573
38-209715
39209715
40838861
411258291
42838861
43-838861
44-3355443
45-5033165
46-3355443

[1,1,1,-1,-3,-5,-3,3,13,19,13,-13,-51,-77,-51,51,
 205,307,205,-205,-819,-1229,-819,819,3277,4915,
 3277,-3277,-13107,-19661,-13107,13107,52429,78643,
 52429,-52429,-209715,-314573,-209715,209715,
 838861,1258291,838861,-838861,-3355443,-5033165,
 -3355443]