Numbers whose base-5 representation contains exactly three 1's and three 4's.

Terms

a(0) =3999a(1) =4299a(2) =4359a(3) =4371a(4) =5799a(5) =5859a(6) =5871a(7) =6159a(8) =6171a(9) =6231a(10) =13299a(11) =13359a(12) =13371a(13) =13659a(14) =13671a(15) =13731a(16) =15159a(17) =15171a(18) =15231a(19) =15531a(20) =16499a(21) =16799a(22) =16859a(23) =16871a(24) =18299a(25) =18359a(26) =18371a(27) =18659a(28) =18671a(29) =18731