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A280339 as a simple table

na(n)
01
12
2-1
3-2
4-5
5-14
64
712
85
940
100
11-26
1211
13-68
14-15
1530
16-18
17106
183
19-50
20-10
21-182
2229
23104
2410
25270
2611
27-130
2837
29-360
30-51
31164
32-16
33506
34-30
35-266
36-65
37-686
3862
39320
4053
41898
4222
43-414
4450
45-1206
46-61
47612
48-52
491560
50-4
51-696
52-81
53-1958
54120

[1,2,-1,-2,-5,-14,4,12,5,40,0,-26,11,-68,-15,30,
 -18,106,3,-50,-10,-182,29,104,10,270,11,-130,37,
 -360,-51,164,-16,506,-30,-266,-65,-686,62,320,53,
 898,22,-414,50,-1206,-61,612,-52,1560,-4,-696,-81,
 -1958,120]