Repdigits (A010785) ordered by sum of digits (A007953).

Terms

a(0) =0a(1) =1a(2) =2a(3) =11a(4) =3a(5) =111a(6) =4a(7) =22a(8) =1111a(9) =5a(10) =11111a(11) =6a(12) =33a(13) =222a(14) =111111a(15) =7a(16) =1111111a(17) =8a(18) =44a(19) =2222a(20) =11111111a(21) =9a(22) =333a(23) =111111111a(24) =55a(25) =22222a(26) =1111111111a(27) =11111111111a(28) =66a(29) =444