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A050457 as a simple table

na(n)
11
21
3-2
41
56
6-2
7-6
81
97
106
11-10
12-2
1314
14-6
15-12
161
1718
187
19-18
206
2112
22-10
23-22
24-2
2531
2614
27-20
28-6
2930
30-12
31-30
321
3320
3418
35-36
367
3738
38-18
39-28
406
4142
4212
43-42
44-10
4542
46-22
47-46
48-2
4943
5031
51-36
5214
5354
54-20
55-60
56-6
5736
5830
59-58
60-12
6162
62-30
63-42
641
6584
6620
67-66
6818
6944
70-36
71-70

[1,1,-2,1,6,-2,-6,1,7,6,-10,-2,14,-6,-12,1,18,7,
 -18,6,12,-10,-22,-2,31,14,-20,-6,30,-12,-30,1,20,
 18,-36,7,38,-18,-28,6,42,12,-42,-10,42,-22,-46,-2,
 43,31,-36,14,54,-20,-60,-6,36,30,-58,-12,62,-30,
 -42,1,84,20,-66,18,44,-36,-70]