a(n) = Sum_{d|n, n/d==1 mod 4} d^12 - Sum_{d|n, n/d==3 mod 4} d^12.
A321836
a(n) = Sum_{d|n, n/d==1 mod 4} d^12 - Sum_{d|n, n/d==3 mod 4} d^12.
Terms
- a(0) =1a(1) =4096a(2) =531440a(3) =16777216a(4) =244140626a(5) =2176778240a(6) =13841287200a(7) =68719476736a(8) =282429005041
External references
- oeis: A321836