Numbers whose base-5 representation has the same number of 1's and 2's.

Terms

a(0) =0a(1) =3a(2) =4a(3) =7a(4) =11a(5) =15a(6) =18a(7) =19a(8) =20a(9) =23a(10) =24a(11) =27a(12) =35a(13) =38a(14) =39a(15) =42a(16) =47a(17) =51a(18) =55a(19) =58a(20) =59a(21) =66a(22) =71a(23) =75a(24) =78a(25) =79a(26) =82a(27) =86a(28) =90a(29) =93