Numbers whose base-5 representation contains exactly three 1's and three 3's.

Terms

a(0) =3968a(1) =4168a(2) =4208a(3) =4216a(4) =5168a(5) =5208a(6) =5216a(7) =5408a(8) =5416a(9) =5456a(10) =10168a(11) =10208a(12) =10216a(13) =10408a(14) =10416a(15) =10456a(16) =11408a(17) =11416a(18) =11456a(19) =11656a(20) =16468a(21) =16668a(22) =16708a(23) =16716a(24) =17668a(25) =17708a(26) =17716a(27) =17908a(28) =17916a(29) =17956