Numbers whose base-7 representation Sum_{i=0..m} d(i)*7^(m-i) has d(i)=0 for all odd i.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =14a(8) =21a(9) =28a(10) =35a(11) =42a(12) =49a(13) =50a(14) =51a(15) =52a(16) =53a(17) =54a(18) =55a(19) =98a(20) =99a(21) =100a(22) =101a(23) =102a(24) =103a(25) =104a(26) =147a(27) =148a(28) =149a(29) =150