a(n) = round(sqrt(n)) - floor(sqrt(n)).

Terms

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