Numbers with only digits "1" and three digits "0".

Terms

a(0) =1000a(1) =10001a(2) =10010a(3) =10100a(4) =11000a(5) =100011a(6) =100101a(7) =100110a(8) =101001a(9) =101010a(10) =101100a(11) =110001a(12) =110010a(13) =110100a(14) =111000a(15) =1000111a(16) =1001011a(17) =1001101a(18) =1001110a(19) =1010011a(20) =1010101a(21) =1010110a(22) =1011001a(23) =1011010a(24) =1011100a(25) =1100011a(26) =1100101a(27) =1100110a(28) =1101001a(29) =1101010