Not of the form n + [log_10 n].

Terms

a(0) =0a(1) =10a(2) =101a(3) =1002a(4) =10003a(5) =100004a(6) =1000005a(7) =10000006a(8) =100000007a(9) =1000000008a(10) =10000000009a(11) =100000000010