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A123876 as a simple table

na(n)
01
1-2
21
34
4-5
51
6-8
718
8-8
91
1016
11-56
1241
13-11
141
15-32
16160
17-170
1873
19-14
201
2164
22-432
23620
24-377
25114
26-17
271
28-128
291120
30-2072
311666
32-704
33164
34-20
351
36256
37-2816
386496
39-6608
403649
41-1178
42223
43-23
441
45-512
466912
47-19392
4824192
49-16722
507001
51-1826
52291
53-26
541

[1,-2,1,4,-5,1,-8,18,-8,1,16,-56,41,-11,1,-32,160,
 -170,73,-14,1,64,-432,620,-377,114,-17,1,-128,
 1120,-2072,1666,-704,164,-20,1,256,-2816,6496,
 -6608,3649,-1178,223,-23,1,-512,6912,-19392,24192,
 -16722,7001,-1826,291,-26,1]