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A215584 as a simple table

na(n)
01
11
2-5
3-44
41485
5-3464
6-1481105
769684616
8402426825
9-343535701904
1029507320454875
11-318475281287624
12-302493631536925155
1352203775001430816856
14-3573196771617434494265
15-521806977065494496500064
16224830933830289537282793745
17-38789418534845196786696365984

[1,1,-5,-44,1485,-3464,-1481105,69684616,
 402426825,-343535701904,29507320454875,
 -318475281287624,-302493631536925155,
 52203775001430816856,-3573196771617434494265,
 -521806977065494496500064,
 224830933830289537282793745,
 -38789418534845196786696365984]