Sums of 2 distinct powers of 10.

Terms

a(0) =11a(1) =101a(2) =110a(3) =1001a(4) =1010a(5) =1100a(6) =10001a(7) =10010a(8) =10100a(9) =11000a(10) =100001a(11) =100010a(12) =100100a(13) =101000a(14) =110000a(15) =1000001a(16) =1000010a(17) =1000100a(18) =1001000a(19) =1010000a(20) =1100000a(21) =10000001a(22) =10000010a(23) =10000100a(24) =10001000a(25) =10010000a(26) =10100000a(27) =11000000a(28) =100000001a(29) =100000010