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A273218 as a simple table

na(n)
11
2-1
3-1
42
5-2
63
7-1
8-7
910
102
11-15
122
1334
14-51
1517
1673
17-218
18323
19-135
20-467
211139
22-1279
23430
241587
25-4274
265798
27-3249
28-5664
2919061
30-26208
319976
3234430
33-77516
3462473
3545193
36-186383
37173814
38186306
39-747220
40754744
41678009
42-3221980
434339761
44-491173
45-8988984
4617693649
47-12889827
48-13658278
4948487713

[1,-1,-1,2,-2,3,-1,-7,10,2,-15,2,34,-51,17,73,
 -218,323,-135,-467,1139,-1279,430,1587,-4274,5798,
 -3249,-5664,19061,-26208,9976,34430,-77516,62473,
 45193,-186383,173814,186306,-747220,754744,678009,
 -3221980,4339761,-491173,-8988984,17693649,
 -12889827,-13658278,48487713]