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A061019 as a simple table

na(n)
11
2-2
3-3
44
5-5
66
7-7
8-8
99
1010
11-11
12-12
13-13
1414
1515
1616
17-17
18-18
19-19
20-20
2121
2222
23-23
2424
2525
2626
27-27
28-28
29-29
30-30
31-31
32-32
3333
3434
3535
3636
37-37
3838
3939
4040
41-41
42-42
43-43
44-44
45-45
4646
47-47
48-48
4949
50-50
5151
52-52
53-53
5454
5555
5656
5757
5858
59-59
6060
61-61
6262
63-63
6464
6565
66-66
67-67
68-68
6969
70-70

[1,-2,-3,4,-5,6,-7,-8,9,10,-11,-12,-13,14,15,16,
 -17,-18,-19,-20,21,22,-23,24,25,26,-27,-28,-29,
 -30,-31,-32,33,34,35,36,-37,38,39,40,-41,-42,-43,
 -44,-45,46,-47,-48,49,-50,51,-52,-53,54,55,56,57,
 58,-59,60,-61,62,-63,64,65,-66,-67,-68,69,-70]