Numbers whose digits all belong to the same residue class mod 9.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =11a(11) =22a(12) =33a(13) =44a(14) =55a(15) =66a(16) =77a(17) =88a(18) =90a(19) =99a(20) =111a(21) =222a(22) =333a(23) =444a(24) =555a(25) =666a(26) =777a(27) =888a(28) =900a(29) =909