Numbers n such that sigma(n) - phi(n) is a repdigit greater than 2.

Terms

a(0) =4a(1) =8a(2) =9a(3) =18a(4) =25a(5) =27a(6) =28a(7) =57a(8) =62a(9) =85a(10) =123a(11) =192a(12) =218a(13) =258a(14) =259a(15) =261a(16) =322a(17) =403a(18) =632a(19) =662a(20) =693a(21) =1127a(22) =2195a(23) =2218a(24) =2321a(25) =2658a(26) =3548a(27) =4577a(28) =4763a(29) =5597