-13841287200domain: ZAppears in sequencesa(n) = 1 - n^12.at n=7A024010a(n) = Sum_{d|n, d==1 mod 4} d^12 - Sum_{d|n, d==3 mod 4} d^12.at n=6A321828a(n) = Sum_{d|n, d==1 mod 4} d^12 - Sum_{d|n, d==3 mod 4} d^12.at n=13A321828