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A019267 as a simple table

na(n)
01
11
21
3-1
4-5
523
653
7-593
8-5165
9110123
10231743
11-8113223
12-33497425
131744764499
143563384029
15-258115578289
16-4191097954685
17402402297433523
18813628574192123
19-99925014024526283
20-403078530716889835
2161606956815080291849

[1,1,1,-1,-5,23,53,-593,-5165,110123,231743,
 -8113223,-33497425,1744764499,3563384029,
 -258115578289,-4191097954685,402402297433523,
 813628574192123,-99925014024526283,
 -403078530716889835,61606956815080291849]