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A138507 as a simple table

na(n)
11
21
3-2
4-3
51
6-2
7-6
85
97
101
1112
126
13-12
14-6
15-2
16-11
17-16
187
1920
20-3
2112
2212
23-22
24-10
251
26-12
27-20
2818
2930
30-2
3132
3221
33-24
34-16
35-6
36-21
37-36
3820
3924
405
4142
4212
43-42
44-36
457
46-22
47-46
4822
4943
501
5132
5236
53-52
54-20
5512
56-30
57-40
5830
5960
606
6162
6232
63-42
64-43
65-12
66-24
67-66
6848
6944
70-6
7172
7235
73-72
74-36
75-2
76-60
77-72
7824

[1,1,-2,-3,1,-2,-6,5,7,1,12,6,-12,-6,-2,-11,-16,7,
 20,-3,12,12,-22,-10,1,-12,-20,18,30,-2,32,21,-24,
 -16,-6,-21,-36,20,24,5,42,12,-42,-36,7,-22,-46,22,
 43,1,32,36,-52,-20,12,-30,-40,30,60,6,62,32,-42,
 -43,-12,-24,-66,48,44,-6,72,35,-72,-36,-2,-60,-72,
 24]