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A159875 as a simple table

na(n)
01
122
2-574
3-59180
4519916
5261887912
63011178424
7-1596218540048
8-57417595289200
912247206626603872
10816168888129047584
11-111619730570629918912
12-11954207592599713998656
131154131532287523742536320
14189809064938941988673313664
15-12919196827586077923635071232

[1,22,-574,-59180,519916,261887912,3011178424,
 -1596218540048,-57417595289200,12247206626603872,
 816168888129047584,-111619730570629918912,
 -11954207592599713998656,
 1154131532287523742536320,
 189809064938941988673313664,
 -12919196827586077923635071232]