Binary expansion contains 001.

Terms

a(0) =9a(1) =17a(2) =18a(3) =19a(4) =25a(5) =33a(6) =34a(7) =35a(8) =36a(9) =37a(10) =38a(11) =39a(12) =41a(13) =49a(14) =50a(15) =51a(16) =57a(17) =65a(18) =66a(19) =67a(20) =68a(21) =69a(22) =70a(23) =71a(24) =72a(25) =73a(26) =74a(27) =75a(28) =76a(29) =77