Numbers whose base-4 and base-10 expansions have no digits in common.

Terms

a(0) =4a(1) =5a(2) =6a(3) =7a(4) =8a(5) =9a(6) =10a(7) =11a(8) =12a(9) =14a(10) =15a(11) =28a(12) =29a(13) =33a(14) =34a(15) =36a(16) =37a(17) =38a(18) =44a(19) =45a(20) =46a(21) =47a(22) =48a(23) =49a(24) =51a(25) =52a(26) =54a(27) =55a(28) =56a(29) =57