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A263047 as a simple table

na(n)
10
21
32
4-1
5-3
6-5
78
8-19
987
10715
11-13672
12-1190179
13-850964313
1411634385277515
15-13847001034356560872
1611783303722311508585098883421
17137091495347348713307137824784782074139687
18-1898306077876225285447341619480271058010077969630158545410485

[0,1,2,-1,-3,-5,8,-19,87,715,-13672,-1190179,
 -850964313,11634385277515,-13847001034356560872,
 11783303722311508585098883421,
 137091495347348713307137824784782074139687,
 -1898306077876225285447341619480271058010077969630\
 158545410485]