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A191498 as a simple table

na(n)
01
11
23
33
4-7
525
6267
7-2261
8-9231
9284337
10-464365
11-45533741
12430558185
138212158409
14-201645489381
15-1064348170245
1694082272856033
17-489731454691487
18-45404775138028509
19840156145287526819
2020537314081214613465
21-913405900816937424519

[1,1,3,3,-7,25,267,-2261,-9231,284337,-464365,
 -45533741,430558185,8212158409,-201645489381,
 -1064348170245,94082272856033,-489731454691487,
 -45404775138028509,840156145287526819,
 20537314081214613465,-913405900816937424519]