Numbers n such that n + phi(n) is a repdigit.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =17a(7) =21a(8) =63a(9) =167a(10) =201a(11) =389a(12) =603a(13) =1667a(14) =3795a(15) =3889a(16) =4465a(17) =5926a(18) =50394a(19) =166667a(20) =510042a(21) =2000001a(22) =3888889a(23) =5185194a(24) =5798663a(25) =5925926a(26) =6000003a(27) =32050435a(28) =200000001a(29) =335447667