Numbers whose base-9 representation Sum_{i=0..m} d(i)*9^i has d(m) >= d(m-1) <= d(m-2) >= ...

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =10a(10) =18a(11) =19a(12) =20a(13) =27a(14) =28a(15) =29a(16) =30a(17) =36a(18) =37a(19) =38a(20) =39a(21) =40a(22) =45a(23) =46a(24) =47a(25) =48a(26) =49a(27) =50a(28) =54a(29) =55