(# 3's)-(# 4's) in first n terms of A031235.

Terms

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