a(n) = Sum_{d|n, d==1 mod 4} d^12 - Sum_{d|n, d==3 mod 4} d^12.
A321828
a(n) = Sum_{d|n, d==1 mod 4} d^12 - Sum_{d|n, d==3 mod 4} d^12.
Terms
- a(0) =1a(1) =1a(2) =-531440a(3) =1a(4) =244140626a(5) =-531440a(6) =-13841287200a(7) =1a(8) =282429005041a(9) =244140626a(11) =-531440a(13) =-13841287200a(15) =1a(17) =282429005041a(19) =244140626
External references
- oeis: A321828