Digitally balanced numbers in base 4: equal numbers of 0's, 1's, ... 3's.

Terms

a(0) =75a(1) =78a(2) =99a(3) =108a(4) =114a(5) =120a(6) =135a(7) =141a(8) =147a(9) =156a(10) =177a(11) =180a(12) =198a(13) =201a(14) =210a(15) =216a(16) =225a(17) =228a(18) =16815a(19) =16827a(20) =16830a(21) =16875a(22) =16878a(23) =16890a(24) =17007a(25) =17019a(26) =17022a(27) =17055a(28) =17079a(29) =17085