a(n) = Sum_{d divides n} (-1)^(d + n/d) * d^11.

A321808

a(n) = Sum_{d divides n} (-1)^(d + n/d) * d^11.

Terms

    a(0) =1a(1) =-2049a(2) =177148a(3) =-4192257a(4) =48828126a(5) =-362976252a(6) =1977326744a(7) =-8585738241a(8) =31381236757a(9) =-100048830174a(10) =285311670612a(11) =-742649943036

External references