G.f. for Moebius transform is x * (1 + x) / (1 + x^4).

Terms

a(0) =1a(1) =2a(2) =1a(3) =2a(4) =0a(5) =1a(6) =1a(7) =2a(8) =2a(9) =2a(10) =1a(11) =1a(12) =0a(13) =1a(14) =0a(15) =2a(16) =2a(17) =3a(18) =1a(19) =2a(20) =0a(21) =1a(22) =1a(23) =1a(24) =1a(25) =2a(26) =2a(27) =1a(28) =0a(29) =0