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A079883 as a simple table

na(n)
11
21
32
4-3
532
6-339
74424
8-75189
91428614
10-32858093
11952884728
12-29539426531
131092958781688
14-44811310049165
151926886332114142
16-90563657609364621
174799873853296324972
18-283192557344483173287
1917274745998013473570574
20-1157407981866902729228387

[1,1,2,-3,32,-339,4424,-75189,1428614,-32858093,
 952884728,-29539426531,1092958781688,
 -44811310049165,1926886332114142,
 -90563657609364621,4799873853296324972,
 -283192557344483173287,17274745998013473570574,
 -1157407981866902729228387]