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

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =14a(7) =23a(8) =28a(9) =45a(10) =51a(11) =55a(12) =56a(13) =63a(14) =161a(15) =189a(16) =275a(17) =543a(18) =567a(19) =1373a(20) =13499a(21) =13642a(22) =25963a(23) =27284a(24) =54568a(25) =135347a(26) =138587a(27) =304779a(28) =1296346a(29) =2592692