a(n) = 2*n*mu(n).

Terms

a(0) =2a(1) =-4a(2) =-6a(3) =0a(4) =-10a(5) =12a(6) =-14a(7) =0a(8) =0a(9) =20a(10) =-22a(11) =0a(12) =-26a(13) =28a(14) =30a(15) =0a(16) =-34a(17) =0a(18) =-38a(19) =0a(20) =42a(21) =44a(22) =-46a(23) =0a(24) =0a(25) =52a(26) =0a(27) =0a(28) =-58a(29) =-60