-5764800domain: ZAppears in sequencesa(n) = 1 - n^8.at n=7A024006a(n) = Sum_{d|n, d==1 mod 4} d^8 - Sum_{d|n, d==3 mod 4} d^8.at n=6A321824a(n) = Sum_{d|n, d==1 mod 4} d^8 - Sum_{d|n, d==3 mod 4} d^8.at n=13A321824