Numbers such that each digit "d" occurs d times, for every digit from 1 to the largest digit.

Terms

a(0) =1a(1) =122a(2) =212a(3) =221a(4) =122333a(5) =123233a(6) =123323a(7) =123332a(8) =132233a(9) =132323a(10) =132332a(11) =133223a(12) =133232a(13) =133322a(14) =212333a(15) =213233a(16) =213323a(17) =213332a(18) =221333a(19) =223133a(20) =223313a(21) =223331a(22) =231233a(23) =231323a(24) =231332a(25) =232133a(26) =232313a(27) =232331a(28) =233123a(29) =233132