a(n) = Sum_{d|n} mu(d)*d^n.

Terms

a(0) =1a(1) =-3a(2) =-26a(3) =-15a(4) =-3124a(5) =45864a(6) =-823542a(7) =-255a(8) =-19682a(9) =9990233352a(10) =-285311670610a(11) =2176246800a(15) =-65535