a(n) = Sum_{k=1..n} mu(k)*k^4.

Terms

a(0) =1a(1) =-15a(2) =-96a(3) =-96a(4) =-721a(5) =575a(6) =-1826a(7) =-1826a(8) =-1826a(9) =8174a(10) =-6467a(11) =-6467a(12) =-35028a(13) =3388a(14) =54013a(15) =54013a(16) =-29508a(17) =-29508a(18) =-159829a(19) =-159829a(20) =34652a(21) =268908a(22) =-10933a(23) =-10933a(24) =-10933a(25) =446043a(26) =446043a(27) =446043a(28) =-261238a(29) =-1071238