Sums of 3 distinct powers of 10.

Terms

a(0) =111a(1) =1011a(2) =1101a(3) =1110a(4) =10011a(5) =10101a(6) =10110a(7) =11001a(8) =11010a(9) =11100a(10) =100011a(11) =100101a(12) =100110a(13) =101001a(14) =101010a(15) =101100a(16) =110001a(17) =110010a(18) =110100a(19) =111000a(20) =1000011a(21) =1000101a(22) =1000110a(23) =1001001a(24) =1001010a(25) =1001100a(26) =1010001a(27) =1010010a(28) =1010100a(29) =1011000