Smallest number containing exactly n distinct numbers in its decimal representation.

Terms

a(0) =0a(1) =11a(2) =10a(3) =100a(4) =102a(5) =120a(6) =1012a(7) =1023a(8) =1120a(9) =1230a(10) =10123a(11) =10234a(12) =11203a(13) =11230a(14) =12340a(15) =101234a(16) =102345a(17) =111230a(18) =112130a(19) =112340a(20) =123450a(21) =1012345a(22) =1023456a(23) =1112130a(24) =1112340a(25) =1121340a(26) =1123450a(27) =1234560