Numbers whose base-5 representation has the same number of 0's as 4's.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =7a(5) =8a(6) =11a(7) =12a(8) =13a(9) =16a(10) =17a(11) =18a(12) =20a(13) =29a(14) =31a(15) =32a(16) =33a(17) =36a(18) =37a(19) =38a(20) =41a(21) =42a(22) =43a(23) =45a(24) =54a(25) =56a(26) =57a(27) =58a(28) =61a(29) =62