Sequence A114384 in binary.

Terms

a(0) =0a(1) =10101a(2) =101010a(3) =111111a(4) =1010100a(5) =1010101a(6) =1111110a(7) =1111111a(8) =10101000a(9) =10101010a(10) =10111101a(11) =10111111a(12) =11111100a(13) =11111101a(14) =11111110a(15) =11111111a(16) =101010000a(17) =101010100a(18) =101010101a(19) =101111010a(20) =101111110a(21) =101111111