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A099843 as a simple table

na(n)
01
1-5
221
3-89
4377
5-1597
66765
7-28657
8121393
9-514229
102178309
11-9227465
1239088169
13-165580141
14701408733
15-2971215073
1612586269025
17-53316291173
18225851433717
19-956722026041
204052739537881
21-17167680177565
2272723460248141
23-308061521170129
241304969544928657

[1,-5,21,-89,377,-1597,6765,-28657,121393,-514229,
 2178309,-9227465,39088169,-165580141,701408733,
 -2971215073,12586269025,-53316291173,225851433717,
 -956722026041,4052739537881,-17167680177565,
 72723460248141,-308061521170129,1304969544928657]