Numbers whose base-6 representation Sum_{i=0..m} d(i)*6^i has d(m) > d(m-1) < d(m-2) > ...

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =12a(8) =13a(9) =18a(10) =19a(11) =20a(12) =24a(13) =25a(14) =26a(15) =27a(16) =30a(17) =31a(18) =32a(19) =33a(20) =34a(21) =37a(22) =38a(23) =39a(24) =40a(25) =41a(26) =73a(27) =74a(28) =75a(29) =76