Numbers consisting of a nonempty string of 1's followed by a nonempty string of 0's.

Terms

a(0) =10a(1) =100a(2) =110a(3) =1000a(4) =1100a(5) =1110a(6) =10000a(7) =11000a(8) =11100a(9) =11110a(10) =100000a(11) =110000a(12) =111000a(13) =111100a(14) =111110a(15) =1000000a(16) =1100000a(17) =1110000a(18) =1111000a(19) =1111100a(20) =1111110a(21) =10000000a(22) =11000000a(23) =11100000a(24) =11110000a(25) =11111000a(26) =11111100a(27) =11111110a(28) =100000000a(29) =110000000