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A261253 as a simple table

na(n)
01
1-4
22
3-2
4-31
5-288
6-2939
7-33944
8-438614
9-6266312
10-98050303
11-1667563622
12-30631857759
13-604518210964
14-12758658946466
15-286833669370926
16-6844757550430019
17-172833310268551740
18-4604828067485736507
19-129123684195177403168
20-3801830662346341617586

[1,-4,2,-2,-31,-288,-2939,-33944,-438614,-6266312,
 -98050303,-1667563622,-30631857759,-604518210964,
 -12758658946466,-286833669370926,
 -6844757550430019,-172833310268551740,
 -4604828067485736507,-129123684195177403168,
 -3801830662346341617586]