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A231727 as a simple table

na(n)
1-1
21
3-1
40
51
6-2
72
8-2
92
10-3
112
120
13-2
143
15-5
165
17-6
186
19-5
205
21-8
228
23-8
240
258
26-8
278
28-13
2915
30-21
3115
32-15
3321
34-15
3513
36-21
3726
38-38
3918
400
41-18
4238
43-26
4421
45-34
4646
47-76
4852
49-48
5048
51-52
5276
53-46
5434
55-55
5680
57-141
5896
59-70
600
6170
62-96
63141
64-80

[-1,1,-1,0,1,-2,2,-2,2,-3,2,0,-2,3,-5,5,-6,6,-5,5,
 -8,8,-8,0,8,-8,8,-13,15,-21,15,-15,21,-15,13,-21,
 26,-38,18,0,-18,38,-26,21,-34,46,-76,52,-48,48,
 -52,76,-46,34,-55,80,-141,96,-70,0,70,-96,141,-80]