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) =9a(7) =10a(8) =11a(9) =12a(10) =13a(11) =17a(12) =18a(13) =19a(14) =20a(15) =25a(16) =26a(17) =27a(18) =33a(19) =34a(20) =41a(21) =63a(22) =64a(23) =70a(24) =71a(25) =72a(26) =77a(27) =78a(28) =79a(29) =80