Numbers whose base-7 representation Sum_{i=0..m} d(i)*7^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) =8a(7) =9a(8) =10a(9) =11a(10) =12a(11) =13a(12) =16a(13) =17a(14) =18a(15) =19a(16) =20a(17) =24a(18) =25a(19) =26a(20) =27a(21) =32a(22) =33a(23) =34a(24) =40a(25) =41a(26) =48a(27) =56a(28) =57a(29) =63