Binary expansions of odd numbers with a single zero in their binary expansion.

Terms

a(0) =101a(1) =1011a(2) =1101a(3) =10111a(4) =11011a(5) =11101a(6) =101111a(7) =110111a(8) =111011a(9) =111101a(10) =1011111a(11) =1101111a(12) =1110111a(13) =1111011a(14) =1111101a(15) =10111111a(16) =11011111a(17) =11101111a(18) =11110111a(19) =11111011a(20) =11111101a(21) =101111111a(22) =110111111a(23) =111011111a(24) =111101111a(25) =111110111a(26) =111111011a(27) =111111101a(28) =1011111111a(29) =1101111111