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) =10a(9) =11a(10) =12a(11) =13a(12) =14a(13) =15a(14) =16a(15) =17a(16) =20a(17) =21a(18) =22a(19) =23a(20) =24a(21) =25a(22) =26a(23) =30a(24) =31a(25) =32a(26) =33a(27) =34a(28) =35a(29) =40