Repdigit numbers n such that the repeated digit of n is equal to the digital root of n.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =99a(11) =999a(12) =3333a(13) =6666a(14) =9999a(15) =99999a(16) =999999a(17) =3333333a(18) =6666666a(19) =9999999a(20) =99999999a(21) =999999999a(22) =1111111111a(23) =2222222222a(24) =3333333333a(25) =4444444444a(26) =5555555555a(27) =6666666666a(28) =7777777777a(29) =8888888888