Sequence A115807 in binary.

Terms

a(0) =0a(1) =11a(2) =110a(3) =1100a(4) =11000a(5) =110000a(6) =110011a(7) =1100000a(8) =1100110a(9) =11000000a(10) =11000011a(11) =11001100a(12) =110000000a(13) =110000011a(14) =110000110a(15) =110011000a(16) =1100000000a(17) =1100000011a(18) =1100000110a(19) =1100001100a(20) =1100110000a(21) =1100110011a(22) =11000000000