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A379109 as a simple table

na(n)
11
2-2
3-3
40
5-6
66
7-7
80
9-1
1012
11-12
120
13-14
1414
1518
160
17-18
182
19-20
200
2121
2224
23-24
240
255
2628
273
280
29-30
30-36
31-31
320
3336
3436
3542
360
37-38
3840
3942
400
41-42
42-42
43-44
440
456
4648
47-48
480
49-1
50-10
5154
520
53-54
54-6
5572
560
5760
5860
59-60
600
61-62
6262
637
640
6584
66-72
67-68
680
6972
70-84
71-72
720
73-74
7476
75-15
760
7784
78-84
79-80
800
810
8284

[1,-2,-3,0,-6,6,-7,0,-1,12,-12,0,-14,14,18,0,-18,
 2,-20,0,21,24,-24,0,5,28,3,0,-30,-36,-31,0,36,36,
 42,0,-38,40,42,0,-42,-42,-44,0,6,48,-48,0,-1,-10,
 54,0,-54,-6,72,0,60,60,-60,0,-62,62,7,0,84,-72,
 -68,0,72,-84,-72,0,-74,76,-15,0,84,-84,-80,0,0,84]