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A257111 as a simple table

na(n)
11
21
32
4-1
53
6-1
75
8-2
94
104
112
12-11
1315
146
15-8
164
176
186
194
20-6
218
224
23-37
2439
25-37
2641
27-39
281
2944
30-32
3128
32-16
33-23
3445
35-39
3629
3716
38-49
3947
40-41
4147
42-45
437
44-1
4525
4616
476
484
49-6
508
514
528
534
54-73
5567
56-61
5757
58-53
5965
604
61-62
6264
634
64-93
65101
66-6
674

[1,1,2,-1,3,-1,5,-2,4,4,2,-11,15,6,-8,4,6,6,4,-6,
 8,4,-37,39,-37,41,-39,1,44,-32,28,-16,-23,45,-39,
 29,16,-49,47,-41,47,-45,7,-1,25,16,6,4,-6,8,4,8,4,
 -73,67,-61,57,-53,65,4,-62,64,4,-93,101,-6,4]