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A180403 as a simple table

na(n)
11
2-1
3-5
4-3
5-93
695
7-793
8-211
9-5853
1027003
11-215955
1257459
13-3518265
143602027
1516811055
16-4362627
17-1846943453
18293601363
19-14911085359
204487888279
21144251733709
22245294787521
23-1936010885087
24228009405371
25-11179552565305
2663485965327535
27-48562641580527

[1,-1,-5,-3,-93,95,-793,-211,-5853,27003,-215955,
 57459,-3518265,3602027,16811055,-4362627,
 -1846943453,293601363,-14911085359,4487888279,
 144251733709,245294787521,-1936010885087,
 228009405371,-11179552565305,63485965327535,
 -48562641580527]