a(n) = Sum_{k=1..n} mu(k) * k^n.

Terms

a(0) =1a(1) =-3a(2) =-34a(3) =-96a(4) =-3399a(5) =30239a(6) =-624046a(7) =-4482626a(8) =-32249230a(9) =9768165230a(10) =-186975207617