The period-doubling sequence A035263 repeated.

Terms

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