Sequence A115772 in binary.

Terms

a(0) =0a(1) =101a(2) =1010a(3) =1111a(4) =10100a(5) =10101a(6) =11110a(7) =11111a(8) =101000a(9) =101010a(10) =101101a(11) =101111a(12) =111100a(13) =111101a(14) =111110a(15) =111111a(16) =1010000a(17) =1010100a(18) =1010101a(19) =1011010a(20) =1011110a(21) =1011111a(22) =1111000a(23) =1111010a(24) =1111100a(25) =1111101a(26) =1111110a(27) =1111111a(28) =10100000