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A302977 as a simple table

na(n)
01
1-1
2-1
3-43
4-223
5-60623
6-764783
7-107351407
8-2499928867
9-596767688063
10-22200786516383
11-64470807442488761
12-3504534741776035061
13-3597207408242668198973
14-268918457620309807441853
15-185388032403184965693274807
16-18241991360742724891839902347

[1,-1,-1,-43,-223,-60623,-764783,-107351407,
 -2499928867,-596767688063,-22200786516383,
 -64470807442488761,-3504534741776035061,
 -3597207408242668198973,-268918457620309807441853,
 -185388032403184965693274807,
 -18241991360742724891839902347]