Positive numbers k such that every base-2 digit of k is a base-4 digit of k.

Terms

a(0) =1a(1) =4a(2) =7a(3) =16a(4) =17a(5) =18a(6) =19a(7) =20a(8) =24a(9) =28a(10) =31a(11) =33a(12) =36a(13) =49a(14) =52a(15) =64a(16) =65a(17) =66a(18) =67a(19) =68a(20) =69a(21) =70a(22) =71a(23) =72a(24) =73a(25) =74a(26) =75a(27) =76a(28) =77a(29) =78