(# 1's)-(# 0's) in first n terms of A030373.

Terms

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