Number of 0's in binary expansion of n.

Terms

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