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A141519 as a simple table

na(n)
0-1
11
2-3
37
4-5
53
6-7
79
8-9
95
10-1
111
12-3
137
14-5
153
16-7
179
18-9
195
20-1
211
22-3
237
24-5
253
26-7
279
28-9
295
30-1
311
32-3
337
34-5
353
36-7
379
38-9
395
40-1
411
42-3
437
44-5
453
46-7
479
48-9
495
50-1
511
52-3
537
54-5
553
56-7
579
58-9
595
60-1
611
62-3
637
64-5
653
66-7
679
68-9
695
70-1
711
72-3
737
74-5
753
76-7
779
78-9
795
80-1
811
82-3
837
84-5
853
86-7
879
88-9
895
90-1
911
92-3

[-1,1,-3,7,-5,3,-7,9,-9,5,-1,1,-3,7,-5,3,-7,9,-9,
 5,-1,1,-3,7,-5,3,-7,9,-9,5,-1,1,-3,7,-5,3,-7,9,-9,
 5,-1,1,-3,7,-5,3,-7,9,-9,5,-1,1,-3,7,-5,3,-7,9,-9,
 5,-1,1,-3,7,-5,3,-7,9,-9,5,-1,1,-3,7,-5,3,-7,9,-9,
 5,-1,1,-3,7,-5,3,-7,9,-9,5,-1,1,-3]